$BTC As of my last knowledge update in January 2022, Bitcoin (BTC) is the first and most well-known cryptocurrency. Created in 2009 by an unknown person or group of people using the pseudonym Satoshi Nakamoto, Bitcoin operates on a decentralized peer-to-peer network. It is often referred to as digital gold and is widely used as a store of value and a medium of exchange.

Bitcoin is based on a technology called blockchain, which is a distributed ledger that records all transactions across a network of computers. It uses a proof-of-work consensus mechanism to validate and secure transactions.

It's important to note that cryptocurrency prices, including Bitcoin, can be highly volatile and subject to rapid changes. For the latest information on Bitcoin, including its current price and market trends, it is recommended to check real-time data on cryptocurrency exchanges or financial news platforms.