Cryptocurrency is a type of digital or virtual currency that uses cryptography for security and operates on decentralized networks, typically powered by blockchain technology. Unlike traditional fiat currencies issued by governments, cryptocurrencies are decentralized, meaning they are not controlled by any central authority, such as a bank or government. Since the launch of Bitcoin (BTC) in 2009, cryptocurrencies have grown exponentially, offering new ways to transact, invest, and participate in the global economy.