Ethereum ($ETH) is the second largest cryptocurrency in the world, officially launched by programmer Vitalik Buterin in 2015. Unlike Bitcoin, Ethereum is not just a digital currency; it is a decentralized blockchain platform that supports the development and operation of smart contracts and decentralized applications (DApps). The emergence of Ethereum has completely changed the application scenarios of blockchain, making it not limited to payments, but rather the infrastructure for a 'global computer'. In 2022, Ethereum completed 'The Merge', transitioning from a proof-of-work (PoW) to a proof-of-stake (PoS) mechanism, significantly reducing energy consumption. $ETH, as the fuel for the platform (Gas fees) and the core asset of the ecosystem, is widely used in various fields such as DeFi, NFTs, and DAOs, and is an important engine for continuous innovation in the blockchain industry.