Bitcoin, initially introduced by Satoshi Nakamoto on November 1, 2008, and launched January 3, 2009, is a decentralized digital currency. It operates without a central bank or intermediary and has inspired various forks like Bitcoin Gold. Recent projects, such as BITCOIN 2150, explore Satoshi's vision with ERC20 tokens and community-driven approaches. The concept continues to evolve, with experiments focusing on complete decentralization and long-term liquidity.