$ETH Ether (ETH) is the second most important cryptocurrency after Bitcoin due to its utility and adoption. While Bitcoin focuses on being a store of value, Ethereum enables smart contracts and decentralized applications (DApps), driving sectors such as decentralized finance (DeFi) and non-fungible tokens (NFT).

Its transition to Proof of Stake in 2022 improved efficiency and sustainability, enhancing its appeal. Additionally, many blockchains and projects rely on Ethereum as a foundational infrastructure. Its constantly innovating ecosystem and high liquidity in the market solidify it as the main alternative to Bitcoin, backed strongly by developers, companies, and users.