The first decentralized cryptocurrency, created in 2009, was Bitcoin. Bitcoin was created by an unknown person or group of people using the pseudonym Satoshi Nakamoto, and it operates on a decentralized network called a blockchain. Bitcoin allows for peer-to-peer transactions without the need for a central authority, and it has gained popularity due to its potential for anonymity, security, and its limited supply. Since the creation of Bitcoin, many other decentralized cryptocurrencies have been developed, some of which have gained significant popularity and market capitalization.