Bitcoin is the first and most well-known cryptocurrency in the world. It was created in 2009 by an unknown person or group of people using the pseudonym Satoshi Nakamoto. Bitcoin transactions are recorded on a public ledger called the blockchain, making it transparent and secure.

Bitcoin's impact on the financial world cannot be overstated. Its decentralized nature and transparent transactions have paved the way for the rise of numerous other cryptocurrencies. Satoshi Nakamoto's vision continues to shape the future of digital currency.