With US bombing Iran, talks of WW3 seems closer and closer. I am, of course, not wishing for this to happen as nothing good will come out of it. But let us think for a second how will bitcoin be useful to us should WW3 actually happen? First of all, expect chaos. Fiat Currencies would most likely decline. Governments would need to print more money to budget for fighting other countries. This will surely lead to inflation. This is where crypto would come in handy. Bitcoin can be a safe haven for most.
The most important thing is if you live in a country directly affected by the war, surely people would migrate and seek shelter. Bitcoins can be helpful for doing this as you will not be carrying your country's local currency. I am sure now that people would be buying crypto in fear of the war happening.
WW3 won't happen, as that would be the end of the entire world. And Bitcoin will not matter anymore in such a case.
It would make more sense to ask which currency is most likely to exist in the (mostly peaceful) future. And I would choose Bitcoin over any other currency
and evenor asset. Fiat is an obsolete concept and we keep finding new discoveries and methods to make physical valuables cheaper or completely redundant.
It makes more sense to stick with Bitcoin.