Bitcoin is a decentralized digital currency, meaning it is not controlled by any government or central bank. Instead, it is managed by a global network of users called the "blockchain." Miners verify transactions and secure the network using computing power, in exchange for rewards in Bitcoin. Additionally, developers contribute to improving the open-source software, while major users (whales) control the market through buying and selling activities. Ultimately, no one controls Bitcoin alone; it is a collective system governed by code rules and consensus among the network participants.