Cryptocurrency is a kind of digital currency or virtual currency and a trading medium. Bitcoin is one of them. On January 3, 2009, bitcoin genesis blockchain was born. Bitcoin is a virtual currency that can be cashed out and converted into the currencies of most countries. We can use bitcoin to pay for some virtual items, such as items in the game. As long as the other party accepts, we can also buy items in real life. Germany is the first country in the world to recognize bitcoin as a private currency.

     Now, more and more countries accept and use bitcoin for transactions. On March 24, 2022, the chairman of the energy committee of the Russian State Duma expressed his willingness to accept bitcoin as a payment method for the export of natural resources. On May 23, French luxury brand Balenciaga said it would accept payment in cryptocurrencies such as bitcoin and Ethereum in the United States. Gafisa, one of Brazil's largest developers, announced that it had begun to accept bitcoin and other cryptocurrencies as payment methods for real estate purchases.