$BTC Bitcoin, often symbolized as $BTC, is a decentralized cryptocurrency that was introduced to the world in 2009 by an individual or group of individuals under the pseudonym Satoshi Nakamoto. Unlike traditional fiat currencies issued by governments (such as the US dollar or the euro), Bitcoin operates on a peer-to-peer network, meaning that transactions occur directly between users without the need for intermediaries like banks.

One of the defining features of Bitcoin is its underlying technology, the blockchain. The blockchain is a public and distributed ledger that securely and transparently records all Bitcoin transactions. Each "block" of the chain contains a batch of transactions, and once added to the chain, it cannot be altered, ensuring the immutability and security of the records.

The creation of new bitcoins occurs through a process called "mining." Miners use powerful computers to solve complex mathematical problems. As a reward for their efforts, they receive new bitcoins and transaction fees. This process not only generates new coins but also helps verify and secure the network.

Bitcoin has gained popularity for several reasons. It offers the potential for lower transaction fees compared to traditional online payment mechanisms and is operated by a decentralized authority, unlike government-issued currencies. Its supply is limited (only 21 million bitcoins will ever be created), which some investors see as a hedge against inflation. However, it is also known for its price volatility and has been the subject of regulatory debate in various countries. Despite this, Bitcoin has paved the way for thousands of other cryptocurrencies and remains an important player in the digital financial landscape.