I don't understand what you really meant by 'hack bitcoin', but if war should happen I believe China will be in charge of Bitcoin, as they right now have the largest Bitcoin mining capacity up to 50% of the mining capacity with US a accounting for just 14%.
And I'm scared what the price would if any such situation. May be 3 times what it is today.

But if you truly mean 'hack bitcoin', I don't think it is possible as it cannot be hacked by anyone