"Crypto" refers to digital or virtual currencies that use cryptography for security. It operates on decentralized networks based on blockchain technology, which is a distributed ledger that records all transactions across multiple computers. This ensures transparency and prevents tampering. Popular cryptocurrencies include Bitcoin, Ethereum, and Litecoin. Investing in crypto can be volatile and risky, but it has gained popularity as an alternative asset class. People use cryptocurrencies for various purposes, including online purchases, investment, and as a means of transferring value. Understanding the technology and market dynamics is essential for anyone looking to engage with cryptocurrencies.