Lu Lei, Vice President of the People's Bank of China, said in the preface of On Money that the urgent problem faced by major developed economies is to "rescue the central bank from the central bankers". Although this approach is by no means the current central bank digital currency (CBDC), as I believe CBDC has no institutional meaning of changing currency increments, is there a digital currency that can overcome the impact of various digital assets, achieve stablecoin effects, and maintain the existence of sovereign currency (solving the problem of currency unification but fiscal decentralization of the euro)? Currently, digital assets are following the old path of the gold standard, and the concept of stablecoins is nothing more than a practical formulation of the "soft version" of the optimal currency area theory.  @iftekharsial