It is pretty sad when I see the inflation is good for currency myth propagated, even between economists. For sure inflation is good for the ones in debt, thus ideal for governments ! But for savers, inflation is terrible and deflation suits them much better. So you have two sides here and saying one is better for currency is ridicilous. By the way, Bitcoin solve this because the final supply is constant, not increasing or decreasing. I'm not sure if that's correct; given an infinite amount of time the Bitcoin supply would approach 0 as all the private keys are lost or destroyed. This however isn't a problem as a single satoshi can be infinitely  subdivided to meet demand.