Stablecoins, or crypto assets which peg their value to less volatile fiat money, are useful tools for a variety of reasons. They can be used to cash out crypto investments, send or receive stable money abroad, and to pay for everyday consumer transactions without fear of fluctuation. A recent estimate from the Bank for International Settlements, or BIS, put the total stablecoin supply at roughly $150 billion. But central banks, the issuers of traditional fiat money around the globe, do not se...