$BTC **Bitcoin (BTC)** is a decentralized cryptocurrency introduced by Satoshi Nakamoto in 2009. It is based on blockchain technology and is issued through a 'mining' mechanism, with a total supply capped at 21 million coins, giving it scarcity and tamper-resistance. Bitcoin does not require support from a central bank or financial institution, allowing users to conduct peer-to-peer transactions directly. Due to its transparency, resistance to censorship, and traceability, it is regarded as 'digital gold' and is favored by many investors. Bitcoin's price is highly volatile, presenting both risks and rewards, and it has been controversial due to issues related to money laundering and regulation, but it has become a core asset of the crypto economy.