The problem is that the item you were buying was priced in terms of fiat currency, such as dollars or euros. When items are priced in crypto, then they don’t fluctuate, because, for example, one bitcoin will always be one bitcoin, no matter what. Whereas a dollar will not always be a dollar. A dollar in 1914 would have bought a lot more than a dollar does today. The three good monies are silver, gold, and crypto. The first two can only be manipulated by going into space and getting asteroids to get more, and the third can only be manipulated by worldwide community consensus, which is really hard to obtain.

Now imagine central bank halving their value to reduce inflation. Its the same thing but you don’t have any control over the money you earned spending the time you did to earn that money. If there was an alternate currency which is not controlled by any government or inflation of a single government that crypto currency.