$ETH Ethereum (ETH) is the second-largest cryptocurrency by market capitalization, known for its smart contract functionality and decentralized applications (dApps). Unlike Bitcoin, ETH is not just a digital currency—it powers the Ethereum network, enabling developers to build DeFi platforms, NFTs, and more. With the transition to Ethereum 2.0 and a proof-of-stake mechanism, it now offers improved scalability, energy efficiency, and lower transaction fees. ETH is widely traded and used as collateral in various blockchain ecosystems. Its versatility and ongoing upgrades make it a cornerstone of the crypto world, attracting developers, investors, and institutions alike.