Fiat being backed by bitcoin is the same thing from a monetary stand point, it’s only functionally different for the user. What it would mean is immediate and impossible to control plummeting of any and all printed currencies when they are printed or new debt is issued. If bitcoin is the highest liquidity market and is the dominate pricing tool, then “hiding” inflation becomes impossible. ALL fiscal decisions result in immediate and sharp declines or increases in fiat purchasing power. It would be the end of widespread systemic theft from the money printer.