I do know how it feels, because I do hold some Bitcoin for "fun". Most of the time, it's down 80% from the previous high. Then it randomly appreciates 10x before cratering again. With any meaningful amount of money, that doesn't feel good at all.

The purchasing power I might lose from a mere $20 is of course irrelevant. If I put it into Bitcoin it might turn into $100 or $200 at an off-chance, but that has nothing to do with inflation. Bitcoin just isn't that correlated with cash. If I wanted to make a $20 bet that the dollar inflates dramatically, I would buy an option to buy gold at $5000.