#AltcoinETFsPostponed Bitcoin (BTC) is a decentralized cryptocurrency created in 2009 by Satoshi Nakamoto. Operating on a blockchain, it enables secure transactions without intermediaries. Its value, volatile, depends on supply and demand, with a maximum of 21 million BTC. Used for payments, investments, or as a store of value, it attracts both enthusiasts and speculators. However, its adoption is hindered by environmental concerns related to the energy consumption of mining and varying regulations. Despite the controversies, Bitcoin remains a symbol of financial innovation, redefining the concept of currency.