$XRP Bitcoin (BTC) and Ethereum (ETH) are leading cryptocurrencies with distinct purposes. BTC, launched in 2009, is a decentralized digital currency focused on being a store of value and medium of exchange, often compared to "digital gold." Its fixed supply of 21 million coins emphasizes scarcity. Ethereum, introduced in 2015, is a platform for decentralized applications and smart contracts, with ETH as its native currency. ETH’s supply is not capped, and its utility drives demand in DeFi and NFTs. BTC prioritizes security and simplicity; ETH emphasizes flexibility and innovation. Both have unique strengths, catering to different blockchain use cases.