$BTC **Bitcoin (BTC)** is the world’s first and most popular cryptocurrency. It was created in 2009 by an unknown person or group using the name **Satoshi Nakamoto**. Bitcoin is a digital currency that allows people to send and receive money over the internet without needing a bank. It runs on a technology called **blockchain**, which keeps records secure and transparent. Only 21 million bitcoins can ever exist, making it limited and valuable. Many people buy BTC as an investment, while others use it to make fast, low-fee international payments. Bitcoin is known for its price swings and its role in shaping the future of money.