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 Crypto, short for "cryptocurrency," refers to a digital or virtual currency that uses cryptography to secure and verify transactions and to control the creation of new units. Cryptocurrencies are decentralized, meaning they are not controlled by a central authority like a government or bank. Instead, they rely on a distributed ledger technology called blockchain, which allows for secure, transparent, and immutable record-keeping.

The most well-known cryptocurrency is Bitcoin, which was created in 2009 by an unknown person or group using the pseudonym Satoshi Nakamoto. Since then, thousands of other cryptocurrencies, often referred to as "altcoins," have been created, each with their own unique features and use cases.

Cryptocurrencies can be used for a variety of purposes, including as a medium of exchange, a store of value, and a speculative investment. Some people also view cryptocurrencies as a way to protect against inflation or as a means of financial freedom, as they can be used to send and receive payments without the need for traditional financial intermediaries.

However, cryptocurrencies are also subject to high volatility and regulatory uncertainty, and their use can sometimes be associated with illegal activities such as money laundering and terrorism financing.

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