I don't know what you're saying. If I charge a particular amount for a loaf of bread and then the cryptocurrency value drops halfway through the day then that person still has the bread but I now don't have the money.
The whole point of currency is to get away from the fluctuating value of exchange that everyone had to deal with when we used to buy things with gold and semi-precious stones.
The fact that they stopped due to volatility kind of proved my point.