Bitcoin is the world's first decentralized digital currency, created in 2009 by an anonymous person using the pseudonym Satoshi Nakamoto. It operates on a peer-to-peer network without intermediaries like banks, using blockchain technology to record transactions. Users can send Bitcoin to each other directly, enabling faster, cheaper, and more secure transactions compared to traditional banking. While Bitcoin faces challenges like volatility and scalability issues, it offers advantages like decentralization, security, and lower transaction fees. Its adoption has grown significantly over the years, influencing the global financial landscape and paving the way for other cryptocurrencies.