Remember also that if all world power holding countries should engage in war in one way or the other there will be some down fall in crypto world too as cyber attacks will be lunched too especially at this technology age .
Can you use analyses to explain this?
Indo not know about other cryptocurrencies, but if I hold bitcoin with a secure setup on a noncustodial wallet, no one will be able to hack the wallet.
Or you are referring to hashrates that may decrease during the time? Miners are spread all over many countries. Even in United States, China, and Kazakhstan with the highest hashrates, miners are spread all through the countries, they are not ina single location.
A war that would weakens the bitcoin hashrate and make 51% attack possible would have lead to almost destruction of the world Ina way that the attacker may not also be able to do the attack.
During war in a country, bitcoin sell at premium price, but I do not know what can be the result of world war on bitcoin.