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What is Cryptocurrency? Cryptocurrency is a digital or virtual currency that uses cryptography for security and is decentralized, meaning it's not controlled by any government or financial institution. The first and most well-known cryptocurrency is Bitcoin, created in 2009 by an anonymous individual or group using the pseudonym Satoshi Nakamoto. Cryptocurrencies are based on a decentralized technology called blockchain, which records transactions across a network of computers. This allows for secure, transparent, and tamper-proof transactions without the need for intermediaries like banks. Key characteristics of cryptocurrencies include: 1. Decentralization: Cryptocurrencies operate independently of central banks and governments. 2. Limited supply: Most cryptocurrencies have a limited supply of coins or tokens. 3. Fast and global transactions: Cryptocurrency transactions are processed quickly, regardless of the sender's and recipient's locations. 4. Security: Cryptocurrenc...