Has digital currency been characterized as a pyramid scheme and fraud by the People’s Bank of China?

It seems so.

The so-called "digital currency" launched by some institutions and enterprises and the so-called promotion of the central bank's issuance of digital currency may involve pyramid schemes and fraud. The general public is requested to increase their risk awareness, invest rationally and prudently, and prevent damage to their interests.

my country’s legal currency is RMB. RMB is uniformly printed and issued by the People's Bank of China. All public and private debts within the territory of our country shall be paid in RMB, and no unit or individual may refuse to accept it. The general public is requested to establish a correct concept of currency, take good care of the RMB, and jointly maintain the normal circulation order of the RMB.

The functions of the Central Bank’s Currency and Gold and Silver Bureau include formulating relevant currency issuance and gold management measures and organizing their implementation; undertaking RMB management and anti-counterfeit currency work.