That's not how floating point works though. The precision is by definition floating. With a sufficiently large number, your least significant bit of precision

That's not how floating point works though. The precision is by definition floating. With a sufficiently large number, your least significant bit of precision might be in the 10s or 100s or more of dollars (or whatever currency). Your issue then is that if you combine a large enough number with anything, then you get precision loss and money just starts disappearing (or appearing out of nowhere). Even if your hyperinflation was over ten orders of magnitude less bad than Zimbabwe's (decimal orders of magnitude even), you would run into floating point precision loss with a 64 bit floating point number.