Cryptocurrencies are virtual currencies based on blockchain technology that uses a network of computers to keep a public ledger of past transactions. The most popular cryptocurrency is Bitcoin, which some believe could replace bonds and serve as a reserve currency in the future. The value of Bitcoin has skyrocketed over recent years, as major companies are buying into it. In February 2021, Tesla Inc. bought $1.5 billion worth of Bitcoin and announced plans to start accepting the currency as payment for its electric vehicles. Since Bitcoin has the potential to be used directly in commercial transactions, fintech companies are developing and patenting related technologies.

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