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 will happen eventually. As America has officially joined the war, China and Russia will also pitch in. Show the possibility of another world war happening is very high. Bitcoin will remain useful as it is today. It is highly likely to give financial protection support because the Fiat currencies are expected to fall.
But I wouldn't only bet on Bitcoin alone. If World war 3 starts, the stock market will be hit and the stock prices will plunge. I would personally invest a lot of money into the stock market when the price is cheaper.
Moreover I do not want such wars to happen as war never did any good to any country, ever. But if it happens capital protection should be our primary goal.