Modern fiat currencies are specifically designed to fail. The governments use them so they can make empty promise debts that they can pay later with devalued collapsing currency. This is why they all fear cryptos. The idea that they can't just float debt and possibly even can't hide spending just terrifies them. Inadvertently... a silver lining to the FRB is the US did prove that a government doesn't have to run a currency. In fact we also proved the ones who should be no where near the operations of a currency is both a government and a bank.