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.
If WW3 plays out, it's not going to be juicy for bitcoin as you have alleged. The price of bitcoin would be affected to a large extent. I remember when Russia - Ukraine fight started newly, it impacted the market negatively. This was between two countries o. Now imagine where more than 10 countries are seriously fighting. The market will definitely crash and that might be the beginning of the bear market and we might recover somewhere 2030.
So, I am of the opinion that WW3 will have more negative impact on bitcoiners than positive.