Web3 is one of those terms that means everything and nothing simultaneously. To true believers, it's the architecture of an internet owned by users rather than corporations — where your data, identity, and assets belong to you, enforced by cryptography rather than terms of service. To sceptics, it's a solution in search of a problem, or a vehicle for financial speculation dressed up as ideology. The truth is messier than either.
Web1 (roughly 1990–2005): read-only. Static websites. You consumed content but couldn't create it. Web2 (2005–present): read-write. Social media, user-generated content, platforms — but platforms own everything. Your Facebook posts, your YouTube channel, your Twitter following — they exist at the platform's discretion and generate value for shareholders, not you. Web3: read-write-own. User-owned assets and identity, enforced by blockchains rather than corporate databases.
DApps are applications whose backend logic runs on a blockchain rather than a centralised server. Uniswap is a DApp — its trading logic runs in a smart contract on Ethereum. No company can take it down (the contract is immutable). No one can freeze your account. The trade-off: the smart contract can't be updated easily if bugs are found, gas fees apply to every interaction, and the UX is significantly worse than centralised alternatives.
A Decentralised Autonomous Organisation (DAO) is an organisation whose rules are encoded in smart contracts and governed by token holders through on-chain voting. No CEO, no board, no HQ. Proposals are submitted, token holders vote, and the smart contract automatically executes the winning outcome.
The largest DAOs manage billions in treasury assets. MakerDAO governs the DAI stablecoin. Uniswap DAO controls protocol parameters. Nouns DAO holds significant ETH from daily NFT auctions.
The original DAO hack: in 2016, "The DAO" raised $150 million in ETH (11.5% of all ETH in existence) in a crowdfunding campaign. A bug in its smart contract allowed an attacker to drain $60 million. The Ethereum community voted to hard-fork the blockchain to reverse the theft — creating Ethereum (the fork) and Ethereum Classic (the original chain). It's the most significant example of blockchain immutability being overridden by human governance when the stakes were high enough.
Every DApp interaction on Ethereum costs gas — the fee paid to validators for computational work. During periods of high network demand (NFT mints, DeFi liquidations, major token launches), gas fees can spike to hundreds of dollars per transaction. This makes Web3 fundamentally inaccessible for small transactions or users in lower-income countries — the opposite of the decentralised financial inclusion it promises. Layer 2 solutions (see that lesson) are the current best answer to this problem.
The Web3 vision is aspirational; the current reality is partial. What genuinely works: DeFi protocols that have operated reliably for years, NFT-based ticketing experiments, on-chain governance for some protocols, self-sovereign identity pilots. What hasn't worked: replacing social media, mainstream DApp adoption, the promise that everyone would migrate off centralised platforms. The internet moved to mobile apps in 2010; Web3 hasn't had its equivalent moment yet.
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