Recently, Agustín Carstens, president of the Bank for International Settlements (BIS), said in an interview that “bitcoin, the general cryptocurrency…they are an interesting development. The main problem is the term 'currency', they are not money, they Not a good value storage method, nor a good accounting unit. Alternating legal tenders (legal tender and fiat currency) is a failed attempt. They play the role of encrypted assets. I hope to see about such assets. The definition is clearer. It may be a general financial asset, but not a cash. Blockchain is a very powerful technology. Blockchain can be very powerful, such as settlement systems, settlement of some back-end financial transactions. I think this technology Should be accepted."