The simple version
Bitcoin is designed to be one thing: a decentralized store of value. Digital gold. Its simplicity is a feature — the network does one job and does it extremely reliably.
Ethereum is a programmable blockchain platform. You can build applications on it — financial contracts, digital ownership (NFTs), decentralized exchanges, lending platforms — all running on code that executes automatically without a bank or company in the middle. Ether (ETH) is the currency that powers this network.
The key distinction: Bitcoin is to Ethereum what gold is to the internet's infrastructure. One is a store of value; the other is a platform for building things. Both are speculative. Neither is a guaranteed investment.
DeFi: why Ethereum actually matters
Decentralized Finance (DeFi) is the most compelling real-world use case for Ethereum. Applications built on Ethereum allow people to borrow, lend, and trade assets without a bank or broker. In countries with unstable banking systems, this is genuinely transformative. In developed markets, it's still mostly speculative and early-stage.
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