Both Bitcoin and Ethereum are leading cryptocurrencies, but they serve different purposes. Bitcoin is a digital currency focused on peer-to-peer transactions, security, and limited supply. Ethereum, on the other hand, is a decentralized platform that enables smart contracts, decentralized applications (dApps), and non-fungible tokens (NFTs). If you're looking for a store of value, Bitcoin might be the better choice. If you're interested in decentralized applications and innovation, Ethereum might be the way to go.