So, you may be right and your parent will also.
Then why are you bringing this up? You said it yourself: "that's not because of the currency". It's because the things you buy became too expensive or too cheap. If the currency remains stable, you could still buy the same amount of most things in other countries not affected by the war.
> if the currency remains stable
> you could still buy the same amount of most things in other countries not affected by the war
Sure I can, sure, but whether or not the currency remains stable is the very question, not a hypothesis. This is circular reasoning. If most things are still sold in exchange for the currency in question, then that currency is still only as stable as the economy that is selling most of the things, by your own definition of an economy of most things.
I'm just saying you have a dysfunctional definition.