Cryptocurrency is a digital or virtual asset that uses cryptography for security and operates on decentralized networks like blockchain. Unlike traditional fiat currencies, cryptocurrencies enable borderless transactions, peer-to-peer transfers, and programmable money through smart contracts. The market is driven by Bitcoin, Ethereum, altcoins, and stablecoins, each serving different purposes, from store-of-value assets to decentralized finance (DeFi) applications. Investors track cryptocurrency market cap, crypto price fluctuations, and token utility to make informed trading and investment decisions.