I will concede that switching out of a high-inflation currency to a stable one is a good idea, and that for many people using cryptocurrency is the only way of circumventing their country's laws on the subject.
However, bitcoin experiences 10-20% drops against the USD on a regular basis. It looks like this announcement has triggered another one. It's not stable, it's just (a) appreciated over time a lot and (b) is doing better against the USD than, say, the Argentine peso.
> By definition, inflation is what happens when the price of a currency is not stable
Inflation is what happens when the price of goods and services in a currency is not stable. It can be triggered without a change in the money supply by underlying shocks to the real economy (e.g. 70s oil shocks)
Bitcoin claims to guarantee money supply stability, but it cannot guarantee price stability.