"$BTC" is the **ticker symbol for Bitcoin**, the first and most famous decentralized digital currency in the world. It was launched in 2009 and operates on blockchain technology, which is a public and distributed ledger that records all transactions securely and transparently.

Bitcoin is characterized by its **limited supply** (21 million units maximum), which gives it properties similar to digital gold in the eyes of some. It is used in **online transactions** and can be stored in digital wallets. Its price is **highly volatile** and is influenced by supply and demand factors, news, institutional adoption, and general market sentiment. Bitcoin is the pioneer of digital currencies and has inspired the emergence of thousands of other cryptocurrencies, and it still holds a central position in the world of digital assets.