$ETH Cryptocurrency* is a digital or virtual currency that uses cryptography for security and operates on decentralized networks, typically through *blockchain technology*. It offers features like *decentralization*, *security*, *transparency*, and *anonymity*. Popular examples include *Bitcoin (BTC)* and *Ethereum (ETH)*. Cryptocurrencies are used for investments, online purchases, cross-border transfers, and decentralized finance (DeFi). While they offer innovative opportunities, they are also highly volatile and come with risks such as security and regulatory challenges.