Bitcoin (BTC) is the first and most well-known cryptocurrency, functioning as a decentralized digital currency on a blockchain network. It operates on a proof-of-work consensus mechanism, with a fixed supply cap of 21 million coins. Bitcoin is widely used for peer-to-peer transactions, store of value, and investment purposes. It is included in various cryptocurrency indices like the GMCI 30 Index, GMCI Index, and Coinbase 50 Index, reflecting its significance in the crypto ecosystem. As a smart contract platform at the base layer (Layer 1), Bitcoin enables secure and transparent transactions without the need for intermediaries.