Bitcoin has a certain monetary function, which can be used to purchase goods and services, make international donations, etc., and reflect its use value. However, since its issuance is independent of the legal tender issuing agency, it has no national credit endorsement, so it is regarded as a private digital currency and does not have the national sovereignty attribute. In the future, China's central bank will launch digital currency, which must be the legal tender of national credit, which is the biggest difference between the two.