Bitcoin is the world's largest cryptocurrency project. The bitcoin (BTC) cryptocurrency was the first of its kind to be built on blockchain technology. Launched in 2009 by an anonymous developer under the pseudonym Satoshi Nakamoto, Bitcoin remains the most widely accepted and traded cryptocurrency today. Like the cryptocurrencies that followed it, Bitcoin was created to provide a decentralized electronic cash system that operates without the intervention of a centralized authority. A global team of developers constantly works on improving Bitcoin and its underlying technology.