Bitcoin is a decentralized digital currency, which means 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 large users (whales) control the market through buying and selling activities. In the end, no one controls Bitcoin alone; rather, it is a collective system governed by code rules and consensus among network participants.