> Tell that to citizens of countries who have experienced hyperinflation and whose currencies became worthless almost overnight.

I don’t think any of my family in Algeria are using Bitcoin, and same for my wife’s family in Bangladesh. In Algeria at least, generally you’ll go to a hawala money changer who gives you better rates than the banks and exchange your local currency into Euros. If you need to send money abroad you use the same old Islamic hawala system to send it to France or wherever else.

There will probably be some useful things built on top of blockchains, and I don’t think crypto has zero value, but I don’t think it’s going to reasonably fix a situation of a failing state.