$BTC Bitcoin (BTC) is a digital currency that operates without the need for a central authority like a bank. It uses blockchain technology, a secure and transparent system that records transactions. Bitcoin allows users to send and receive money directly, without intermediaries. The currency is known for its volatility, meaning its value can change rapidly. Bitcoin has become popular as both a store of value and a means of payment. It can be used for online purchases or as an investment. Despite its advantages, Bitcoin faces challenges such as regulatory concerns and scalability issues. However, it continues to gain global attention.