$ETH Ethereum is a decentralized blockchain platform that enables developers to build and deploy smart contracts and decentralized applications (dApps). Launched in 2015 by Vitalik Buterin, it introduced the concept of programmable blockchain, going beyond Bitcoin's simple value transfer. Ethereum uses Ether (ETH) as its native cryptocurrency to power transactions and computational services. With the 2022 upgrade to Ethereum 2.0, it transitioned from Proof of Work to Proof of Stake, improving energy efficiency and scalability. Ethereum supports a vast ecosystem of DeFi, NFTs, and Web3 applications, making it a foundational layer in the blockchain space and the broader digital economy.