Cryptocurrencies are digital or virtual currencies that use cryptography for security. They operate on decentralized networks based on blockchain technology, which ensures transparency and immutability. Unlike traditional currencies issued by governments, cryptocurrencies are often created through a process called mining and are not controlled by any central authority. Bitcoin, created in 2009 by an unknown person or group using the name Satoshi Nakamoto, was the first and remains the most well-known cryptocurrency. Other popular cryptocurrencies include Ethereum, Ripple, and Litecoin. They can be used for various purposes, including online transactions, investments, and as a means to raise funds through Initial Coin Offerings (ICOs).
