Sure, the things being traded with a money supply can decrease and if the money supply doesn't decrease alongside, it also is inflationary. BTC was used to trad

Sure, the things being traded with a money supply can decrease and if the money supply doesn't decrease alongside, it also is inflationary. BTC was used to trade USD, supply of USD is decreasing while BTC is algorithmically not decreasing, so it shows a great deal of inflation in the purchase of USD (and the reverse during the run-up), which unfortunately you cannot prevent unless you instituted capital controls.