Cryptocurrencies are digital assets that use cryptography to secure transactions and control the creation of new units. Bitcoin, launched in 2009, was the first cryptocurrency and still dominates the market. Unlike traditional currencies, cryptocurrencies do not rely on central banks or governments, making them decentralized. They use blockchain technology, a distributed database that ensures transparency and security. Although their adoption has grown, they also face challenges such as volatility, uncertain regulation, and use in illicit activities. Nevertheless, many see them as an innovative financial alternative and a future store of value.$USDC