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Cryptocurrency is a form of digital money that uses cryptography for security and operates on decentralized networks, typically based on blockchain technology. Unlike traditional currencies issued by governments, cryptocurrencies are not controlled by any central authority, making them resistant to censorship and interference. Popular examples include Bitcoin and Ethereum. Transactions are recorded on a public ledger, ensuring transparency and security. Cryptocurrencies can be used for online purchases, investments, and transferring value globally with low fees. However, they are also known for price volatility and regulatory uncertainty. As technology evolves, cryptocurrencies continue to shape the future of finance and digital innovation worldwide.