https://money.usnews.com/investing/articles/the-history-of-bitcoin
Bitcoin (BTC) was the first cryptocurrency ever created back in 2009, and it remains the most popular and valuable digital currency in the world today. Bitcoin is a blockchain-based decentralized digital currency powered by a network of users who verify and record transactions without relying on a central authority or intermediary. Bitcoin is an alternative to fiat currencies, such as the U.S. dollar, that are controlled by governments and central banks. Transactions are verified via a process k