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Gold buggery, now crypto, is an old scam. In truth, sound money has never existed.
And it cannot exist. Value is a subjective measure on reality. Transporting that across time requires work. Expecting to get that transport for free is the perpetual-motion problem of finance.
Money is just "here's a pig, owe me one" in token form.
A bank acts like an internet router but one that transforms the risk relationship. It is not an intermediary that accepts deposits and lends them on. It is an intermediary that acts as a third party to a double sided debt contract where one side owes products and services to the creditor and another side owes money to the debtor.
From an engineering perspective a debt based system has a lot more guarantees about what will happen to the economy from a stability perspective. There is still the obvious non determinism of not paying debts on time but it sounds like it could be solved by introducing negative feedback so that the system self stabilized toward a desired state.
But this "sound" money thing, it is supposed to work just by sheer willpower alone.