Cryptocurrencies, including Bitcoin, currently have no positive value and have not brought any benefits to the economy. Speaking of value, it refers to the value of black assets. Criminals who engage in black and gray assets particularly enjoy cryptocurrency. And the value of wealth transfer, transferring money from the leek pocket to another group of people's pockets. A small number of people who make money through mining, hoarding coins, and legitimate trading may be one of the few clean people. Stablecoins may have positive value in the future.