Liu Lei, deputy governor of the People's Bank of China, stated in the preface to "Monetary Theory" that the urgent problem faced by major developed economies is "to save central banks from central bankers". Although this idea is not the current central bank digital currency (CBDC), because I believe that CBDC has no institutional meaning to change the currency increment, is there a digital currency that can overcome various impacts of digital assets, achieve stable currency effects, and maintain the existence of sovereign currencies (solving the problem of currency unification but fiscal decentralization of the euro)? Currently, digital assets are following the old path of gold standard, and the stable currency concept is nothing more than a realistic proposal of the optimal currency area theory in its "soft version".
In the field of monetary economics forecasting and practice, there are two highly respected people - the recently deceased Robert Mundell and the mysterious Satoshi Nakamoto, who watched his own creation of Bitcoin evolve into an extremely expensive digital asset. Currently, the energy consumed worldwide each year to mine the last 2 million coins is enough for over 100 million people to use for more than a year. According to the marginal cost pricing method, the closer Bitcoin is to an asset, the farther away it is from widely circulated currency.
