Back to: Crypto Fundamentals from Zero
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Expressing rules as code
Bitcoin introduced decentralized money. Ethereum introduced the world computer: a blockchain that runs arbitrary programs called smart contracts.
A smart contract is a program that executes exactly as written, by the network, with no human in the loop. It can hold funds, move them, and enforce conditions — for example “pay the escrow buyer only after a signed receipt”.
What changes
- Programmable ownership — apps nobody can shut down (censorship-resistant applications).
- Open money lego — contracts can call other contracts, composing systems of finance.
- New risk — code is law, including when the code has a bug. Audits matter.
Nearly every “altcoin” and DeFi app you will ever see is, at heart, a set of smart contracts. Learning to evaluate their safety and decentralization is exactly what the W3D Terminal was built for.
Rule of thumb: If you cannot read a project’s code or its audit reports, you are trusting the team — that is concentration risk, and the W3D methodology will score it that way.