Learn: What Is Web3?

Web3 is being touted as the future of the internet. The vision for this new, blockchain-based web includes cryptocurrencies, NFTs, DAOs, decentralized finance, and more.

This article was originally published on Harvard Business Review, written by Thomas Stackpole

Do you remember the first time you heard about Bitcoin? Maybe it was a faint buzz about a new technology that would change everything. Perhaps you felt a tingle of FOMO as the folks who got in early suddenly amassed a small fortune — even if it wasn’t clear what the “money” could legitimately be spent on (really expensive pizza?). Maybe you just wondered whether your company should be working on a crypto strategy in case it did take off in your industry, even if you didn’t really care one way about it or the other.

And, of course, it would come back.

Bitcoin now seems to be everywhere. Amidst all the demands on our attention, many of us didn’t notice cryptocurrencies slowly seeping into the mainstream. Until suddenly Larry David was pitching them during the Super Bowl; stars like Paris Hilton, Tom Brady, and Jamie Foxx were hawking them in ads; and a frankly terrifying Wall Street–inspired robot bull celebrating cryptocurrency was unveiled in Miami. What was first a curiosity and then a speculative niche has become big business.

Crypto, however, is just the tip of the spear. The underlying technology, blockchain, is what’s called a “distributed ledger” — a database hosted by a network of computers instead of a single server — that offers users an immutable and transparent way to store information. Blockchain is now being deployed to new ends: for instance, to create “digital deed” ownership records of unique digital objects — or nonfungible tokens. NFTs have exploded in 2022, conjuring a $41 billion market seemingly out of thin air. Beeple, for example, caused a sensation last year when an NFT of his artwork sold for $69 million at Christie’s. Even more esoteric cousins, such as DAOs, or “decentralized autonomous organizations,” operate like headless corporations: They raise and spend money, but all decisions are voted on by members and executed by encoded rules. One DAO recently raised $47 million in an attempt to buy a rare copy of the U.S. Constitution. Advocates of DeFi (or “decentralized finance,” which aims to remake the global financial system) are lobbying Congress and pitching a future without banks.

The totality of these efforts is called “Web3.” The moniker is a convenient shorthand for the project of rewiring how the web works, using blockchain to change how information is stored, shared, and owned. In theory, a blockchain-based web could shatter the monopolies on who controls information, who makes money, and even how networks and corporations work. Advocates argue that Web3 will create new economies, new classes of products, and new services online; that it will return democracy to the web; and that is going to define the next era of the internet. Like the Marvel villain Thanos, Web3 is inevitable.

Or is it? While it’s undeniable that energy, money, and talent are surging into Web3 projects, remaking the web is a major undertaking. For all its promise, blockchain faces significant technical, environmental, ethical, and regulatory hurdles between here and hegemony. A growing chorus of skeptics warns that Web3 is rotten with speculation, theft, and privacy problems, and that the pull of centralization and the proliferation of new intermediaries is already undermining the utopian pitch for a decentralized web.

Meanwhile, businesses and leaders are trying to make sense of the potential — and pitfalls — of a rapidly changing landscape that could pay serious dividends to organizations that get it right. Many companies are testing the Web3 waters, and while some have enjoyed major successes, several high-profile firms are finding that they (or their customers) don’t like the temperature. Most people, of course, don’t even really know what Web3 is: In a casual poll of HBR readers on LinkedIn in March 2022, almost 70% said they didn’t know what the term meant.

Welcome to the confusing, contested, exciting, utopian, scam-ridden, disastrous, democratizing, (maybe) decentralized world of Web3. Here’s what you need to know.

Install Update: From Web1 to Web3

To put Web3 into context, let me offer a quick refresher.

In the beginning, there was the internet: the physical infrastructure of wires and servers that lets computers, and the people in front of them, talk to each other. The U.S. government’s ARPANET sent its first message in 1969, but the web as we know it today didn’t emerge until 1991, when HTML and URLs made it possible for users to navigate between static pages. Consider this the read-only web, or Web1.

In the early 2000s, things started to change. For one, the internet was becoming more interactive; it was an era of user-generated content, or the read/write web. Social media was a key feature of Web2 (or Web 2.0, as you may know it), and Facebook, Twitter, and Tumblr came to define the experience of being online. YouTube, Wikipedia, and Google, along with the ability to comment on content, expanded our ability to watch, learn, search, and communicate.

The Web2 era has also been one of centralization. Network effects and economies of scale have led to clear winners, and those companies (many of which are listed above) have produced mind-boggling wealth for themselves and their shareholders by scraping users’ data and selling targeted ads against it. This has allowed services to be offered for “free,” though users initially didn’t understand the implications of that bargain. Web2 also created new ways for regular people to make money, such as through the sharing economy and the sometimes lucrative job of being an influencer.

There’s plenty to critique in the current system: The companies with concentrated or near-monopoly power have often failed to wield it responsibly, consumers who now realize that they are the product are becoming increasingly uncomfortable with ceding control of their personal data, and it’s possible that the targeted-ad economy is a fragile bubble that does little to actually boost advertisers. As the web has grown up, centralized, and gone corporate, many have started to wonder whether there’s a better future out there.

Which brings us to Web3. Advocates of this vision are pitching it as a roots-deep update that will correct the problems and perverse incentives of Web2. Worried about privacy? Encrypted wallets protect your online identity. About censorship? A decentralized database stores everything immutably and transparently, preventing moderators from swooping in to delete offending content. Centralization? You get a real vote on decisions made by the networks you spend time on. More than that, you get a stake that’s worth something — you’re not a product, you’re an owner. This is the vision of the read/write/own web.

OK, but What Is Web3?

The seeds of what would become Web3 were planted in 1991, when scientists W. Scott Stornetta and Stuart Haber launched the first blockchain — a project to time-stamp digital documents. But the idea didn’t really take root until 2009, when Bitcoin was launched in the wake of the financial crisis (and at least partially in response to it) by the pseudonymous inventor Satoshi Nakamoto. It and its undergirding blockchain technology work like this: Ownership of the cryptocurrency is tracked on a shared public ledger, and when one user wants to make a transfer, “miners” process the transaction by solving a complex math problem, adding a new “block” of data to the chain and earning newly created bitcoin for their efforts. While the Bitcoin chain is used just for currency, newer blockchains offer other options. Ethereum, which launched in 2015, is both a cryptocurrency and a platform that can be used to build other cryptocurrencies and blockchain projects. Gavin Wood, one of its cofounders, described Ethereum as “one computer for the entire planet,” with computing power distributed across the globe and controlled nowhere. Now, after more than a decade, proponents of a blockchain-based web are proclaiming that a new era — Web3 — has dawned.

Put very simply, Web3 is an extension of cryptocurrency, using blockchain in new ways to new ends. A blockchain can store the number of tokens in a wallet, the terms of a self-executing contract, or the code for a decentralized app (dApp). Not all blockchains work the same way, but in general, coins are used as incentives for miners to process transactions. On “proof of work” chains like Bitcoin, solving the complex math problems necessary to process transactions is energy-intensive by design. On a “proof of stake” chain, which are newer but increasingly common, processing transactions simply requires that the verifiers with a stake in the chain agree that a transaction is legit — a process that’s significantly more efficient. In both cases, transaction data is public, though users’ wallets are identified only by a cryptographically generated address. Blockchains are “write only,” which means you can add data to them but can’t delete it.

Web3 and cryptocurrencies run on what are called “permissionless” blockchains, which have no centralized control and don’t require users to trust — or even know anything about — other users to do business with them. This is mostly what people are talking about when they say blockchain. “Web3 is the internet owned by the builders and users, orchestrated with tokens,” says Chris Dixon, a partner at the venture capital firm a16z and one of Web3’s foremost advocates and investors, borrowing the definition from Web3 adviser Packy McCormick. This is a big deal because it changes a foundational dynamic of today’s web, in which companies squeeze users for every bit of data they can. Tokens and shared ownership, Dixon says, fix “the core problem of centralized networks, where the value is accumulated by one company, and the company ends up fighting its own users and partners.”

In 2014, Ethereum’s Wood wrote a foundational blog post in which he sketched out his view of the new era. Web3 is a “reimagination of the sorts of things we already use the web for, but with a fundamentally different model for the interactions between parties,” he said. “Information that we assume to be public, we publish. Information that we assume to be agreed, we place on a consensus-ledger. Information that we assume to be private, we keep secret and never reveal.” In this vision, all communication is encrypted, and identities are hidden. “In short, we engineer the system to mathematically enforce our prior assumptions, since no government or organization can reasonably be trusted.”

The idea has evolved since then, and new use cases have started popping up. The Web3 streaming service Sound.xyz promises a better deal for artists. Blockchain-based games, like the Pokémon-esque Axie Infinity, let users earn money as they play. So-called “stablecoins,” whose value is pegged to the dollar, the euro, or some other external reference, have been pitched as upgrades to the global financial system. And crypto has gained traction as a solution for cross-border payments, especially for users in volatile environments.

“Blockchain is a new type of computer,” Dixon tells me. Just like it took years to understand the extent to which PCs and smartphones transformed the way we use technology, blockchain has been in a long incubation phase. Now, he says, “I think we might be in the golden period of Web3, where all the entrepreneurs are entering.” Although the eye-popping price tags, like the Beeple sale, have garnered much of the attention, there’s more to the story. “The vast majority of what I’m seeing is smaller-dollar things that are much more around communities,” he notes, like Sound.xyz. Whereas scale has been a key measure of a Web2 company, engagement is a better indicator of what might succeed in Web3.

Dixon is betting big on this future. He and a16z started putting money into the space in 2013 and invested $2.2 billion in Web3 companies last year. He is looking to double that in 2022. The number of active developers working on Web3 code nearly doubled in 2021, to roughly 18,000 — not huge, considering global numbers, but notable nonetheless. Perhaps most significantly, Web3 projects have become part of the zeitgeist, and the buzz is undeniable.

But as high-profile, self-immolating startups like Theranos and WeWork remind us, buzz isn’t everything. So what happens next? And what should you watch out for?

What Web3 Might Mean for Companies

Web3 will have a few key differences from Web2: Users won’t need separate log-ins for every site they visit but instead will use a centralized identity (probably their crypto wallet) that carries their information. They’ll have more control over the sites they visit, as they earn or buy tokens that allow them to vote on decisions or unlock functionality.

It’s still unclear whether the product lives up to the pitch. Predictions as to what Web3 might look like at scale are just guesses, but some projects have grown pretty big. The Bored Ape Yacht Club (BAYC), NBA Top Shot, and the cryptogaming giant Dapper Labs have built successful NFT communities. Clearinghouses such as Coinbase (for buying, selling, and storing cryptocurrency) and OpenSea (the largest digital marketplace for crypto collectibles and NFTs) have created Web3 on-ramps for people with little to no technical know-how.

While companies such as Microsoft, Overstock, and PayPal have accepted cryptocurrencies for years, NFTs — which have recently exploded in popularity — are the primary way brands are now experimenting with Web3. Practically speaking, an NFT is some mix of a deed, a certificate of authenticity, and a membership card. It can confer “ownership” of digital art (typically, ownership is recorded on the blockchain and a link points to an image somewhere) or rights or access to a group. NFTs can operate on a smaller scale than coins because they create their own ecosystems and require nothing more than a community of people who find value in the project. For example, baseball cards are valuable only to certain collectors, but that group really believes in their value.

Most successful forays by traditional companies into Web3 have been ones that create communities or plug in to existing ones. Consider the NBA: Top Shot was one of the first NFT projects from a legacy brand, and it offered fans the opportunity to buy and trade clips, called “moments” (a LeBron James dunk, for instance), that function like trading cards. It took off because it created a new kind of community space for fans, many of whom may have already been collecting basketball cards. Other front-runner brands, such as Nike, Adidas, and Under Armour, similarly added a digital layer to their existing collector communities. All three companies offer NFTs that can be used in the virtual world — for example, allowing the owner to gear up an avatar — or that confer rights to products or exclusive streetwear drops in the real world. Adidas sold $23 million worth of NFTs in less than a day and instantly created a resale market on OpenSea, just like what you might see after a limited drop of new shoes. Similarly, Time magazine launched an NFT project to build an online community that leverages the publication’s deep history.

Bored Ape Yacht Club is the biggest success story of an NFT project going mainstream. Combining hype and exclusivity, BAYC offers access to real-life parties and to online spaces, along with usage rights to the ape’s image — further reinforcing the brand. An ape NFT puts the owner in an exclusive club, both figuratively and literally.

One lesson from these efforts is that on-ramps matter, but less so the more committed the community is. Getting a crypto wallet isn’t hard, but it is an added step. So Top Shot doesn’t require a one — users can just plug in their credit card — which helped it acquire interested users new to NFTs. The Bored Ape Yacht Club was a niche interest, but when it took off, it became a catalyst for people to create wallets and drove interest in OpenSea.

Some companies have had rockier experiences with NFT projects and crytpo features. For example, when Jason Citron, the CEO of Discord, a voice, video, and text communication service, teased a feature that could connect the app to crypto wallets, Discord users mutinied, leading him to clarify that the company had “no current plans” to launch the tie-in. The underwear brand MeUndies and the UK branch of the World Wildlife Fund both quickly pulled the plug on NFT projects after a fierce backlash by customers furious about their sizable carbon footprint. Even the success stories have hit bumps in the road. Nike is currently fighting to have unauthorized NFTs “destroyed,” and OpenSea is full of knockoffs and imitators. Given that blockchain is immutable, this is raising novel legal questions, and it isn’t clear how companies will handle the issue. Further, there’s recent evidence that the market for NFTs is stalling entirely.

Companies who are considering stepping into this space should remember this: Web3 is polarizing, and there are no guarantees. Amid many points of disagreement, the chief divide is between people who believe in what Web3 could be and critics who decry the many problems dogging it right now.

System Error: The Case Against Web3

The early days of a technology are a heady time. The possibilities are endless, and there’s a focus on what it can do — or will do, according to optimists. I’m old enough to remember when the unfettered discourse enabled by Twitter and Facebook was supposed to sow democracy the world over. As Web3’s aura of inevitability (and profitability) wins converts, it’s important to consider what could go wrong and recognize what’s already going wrong.

It’s rife with speculation.

Skeptics argue that for all the rhetoric about democratization, ownership opportunities, and mass wealth building, Web3 is nothing more than a giant speculative economy that will mostly make some already-rich people even richer. It’s easy to see why this argument makes sense. The top 0.01% of bitcoin holders own 27% of the supply. Wash trading, or selling assets to yourself, and market manipulation have been reported in both crypto and NFT markets, artificially pumping up value and allowing owners to earn coins through sham trades. In an interview on the podcast The Dig, reporters Edward Ongweso Jr. and Jacob Silverman characterized the whole system as an elaborate upward transfer of wealth. Writing in The Atlantic, investor Rex Woodbury called Web3 “the financialization of everything” (and not in a good way). On a more granular level, Molly White, a software engineer, created Web3 Is Going Just Great, where she tracks the many hacks, scams, and implosions in the Web3 world, underscoring the pitfalls of the unregulated, Wild West territory. The unpredictable, speculative nature of the markets may be a feature, not a bug. According to technologist David Rosenthal, speculation on cryptocurrencies is the engine that drives Web3 — that it can’t work without it. “[A] permissionless blockchain requires a cryptocurrency to function, and this cryptocurrency requires speculation to function,” he said in a talk at Stanford in early 2022. Basically, he’s describing a pyramid scheme: Blockchains need to give people something in exchange for volunteering computing power, and cryptocurrencies fill that role — but the system works only if other people are willing to buy them believing that they’ll be worth more in the future. Stephen Diehl, a technologist and vocal critic of Web3, floridly dismissed blockchain as “a one-trick pony whose only application is creating censorship-resistant crypto investment schemes, an invention whose negative externalities and capacity for harm vastly outweigh any possible uses.”

The tech isn’t practical (and it’s expensive).

Questions abound as to whether Web3 — or blockchain, really — makes sense as the technology that will define the web’s next era. “Whether or not you agree with the philosophy/economics behind cryptocurrencies, they are — simply put — a software architecture disaster in the making,” says Grady Booch, chief scientist for software engineering at IBM Research. All technology comes with trade-offs, Booch explained in a Twitter Spaces conversation, and the cost of a “trustless” system is that it’s highly inefficient, capable of processing only a few transactions per minute — tiny amounts of data compared with a centralized system like, say, Amazon Web Services. Decentralization makes technology more complicated and further out of reach for basic users, rather than simpler and more accessible.

While it’s possible to fix this by adding new layers that can speed things up, doing so makes the whole system more centralized, which defeats the purpose. Moxie Marlinspike, founder of the encrypted messaging app Signal, put it this way: “Once a distributed ecosystem centralizes around a platform for convenience, it becomes the worst of both worlds: centralized control, but still distributed enough to become mired in time.”

Right now, the inefficiency of blockchain comes at a cost, quite literally. Transaction costs on Bitcoin and Ethereum (which calls them gas fees) can run anywhere from a few bucks to hundreds of dollars. Storing one megabyte of data on a blockchain distributed ledger can cost thousands, or even tens of thousands, of dollars — yes, you read that correctly. That’s why the NFT you bought probably isn’t actually on a blockchain. The code on the chain indicating your ownership includes an address, pointing to where the image is stored. Which can and has caused problems, including your pricy purchase disappearing if the server it actually lives on goes down.

It enables harassment and abuse.

The potential for disastrous unintended consequences is very real. “While blockchain proponents speak about a ‘future of the web’ based around public ledgers, anonymity, and immutability,” writes Molly White, “those of us who have been harassed online look on in horror as obvious vectors for harassment and abuse are overlooked, if not outright touted as features.” Although crypto wallets theoretically provide anonymity, the fact that transactions are public means that they can be traced back to individuals. (The FBI is pretty good at doing this, which is why crypto isn’t great for criminal enterprise.) “Imagine if, when you Venmo-ed your Tinder date for your half of the meal, they could now see every other transaction you’d ever made,” including with other dates, your therapist, and the corner store by your house. That information in the hands of an abusive ex-partner or a stalker could be life-threatening.

The immutability of the blockchain also means that data can’t be taken down. There’s no way to erase anything, whether it’s a regrettable post or revenge porn. Immutability also could spell major problems for Web3 in some places, such as Europe, where the General Data Protection Regulation (GDPR) enshrines the right to have personal data erased.

It’s currently terrible for the environment.

Web3’s environmental impact is vast and deeply damaging. It can be broken into two categories: energy use and tech waste, both of which are products of mining. Running a network that depends on supercomputers competing to solve complex equations every time you want to save data on a blockchain takes a tremendous amount of energy. It also generates e-waste: According to Rosenthal, Bitcoin produces “an average of one whole MacBook Air of e-waste per ‘economically meaningful’ transaction” as miners cycle through quantities of short-lived computer hardware. The research he bases this claim on, by Alex de Vries and Christian Stoll, found that the annual e-waste created by Bitcoin is comparable to the amount produced by a country the size of the Netherlands.

Whether and how these issues will be addressed is hard to say, in part because it’s still unclear whether Web3 will really catch on. Blockchain is a technology in search of a real use, says technology writer Evgeny Morozov. “The business model of most Web3 ventures is self-referential in the extreme, feeding off people’s faith in the inevitable transition from Web 2.0 to Web3.” Tim O’Reilly, who coined “Web 2.0” to describe the platform web of the early 2000s, claims that we’re in an investment boom reminiscent of the dot-com era before the bottom fell out. “Web 2.0 was not a version number, it was the second coming of the web after the dot-com bust,” he says. “I don’t think we’re going to be able to call Web3 ‘Web3’ until after the crypto bust. Because only then will we get to see what’s stuck around.”

If that’s true, then innovation is going to come at significant cost. As Hilary Allen, an American University law professor who studies the 2008 financial crisis, points out, the system now “mirrors and magnifies the fragilities of shadow banking innovations that resulted in the 2008 financial crisis.” If the Web3 bubble bursts, it could leave a lot of folks high and dry.

Early Days Are Here Again

So, where exactly is Web3 headed? Ethereum cofounder Vitalik Buterin has expressed concerns about the direction his creation has taken but continues to be optimistic. In a response to Marlinspike on the Ethereum Reddit page, he conceded that the Signal founder presented “a correct criticism of the current state of the ecosystem” but maintained that the decentralized web is catching up, and pretty quickly at that. The work being done now — creating libraries of code — will soon make it easier for other developers to start working on Web3 projects. “I think the properly authenticated decentralized blockchain world is coming and is much closer to being here than many people think.”