Bitcoin is a digital currency built on a decentralized ledger system known as the blockchain. It is the first and most popular cryptocurrency, and it is used as a store of value and a medium of exchange. Bitcoin transactions are secured through a proof-of-work system, which requires miners to solve complex mathematical equations in order to validate transactions.
Ethereum is an open source, blockchain-based distributed computing platform. It allows developers to create and deploy decentralized applications (dApps) and smart contracts on the Ethereum network. Ethereum is powered by its own cryptocurrency, Ether, which is used to pay for transaction fees and services on the network. Unlike Bitcoin, Ethereum is designed to be more than just a decentralized digital currency. It is a platform for developers to create applications and use smart contracts to execute transactions.