Already products like this Blink wallet offers it, Fuji Moneys FUSD on Liquid and eCash mints can do it, but like fiat it requires a counterparty to manage and then again these BTC-backed USD isn't interoperable with many payment providers so where are you spending it or using it?

Not in the long run

just sign a promissory note promising btc, voila'

I preferred it if my tea was priced at 3 sats, not 3$.. If that makes senses

The dollar was backed by gold, look where that lead us to..

The USA couldnt afford it.