Weakness of Bitcoin Standard?

I fully support Bitcoin Standard and the idea of fair money, but I'm afraid there is a huge con and correct me if I'm being irrelevant or anything.

Let's say there are 2 countries X and Y.

X adopted Bitcoin standard and is a solid democratic country. Y has a fiat standard, imperialist goals with ruthless dictator.

If these two countries are fighting each other, Y will have full power and flexibility to fund a war while X will be weak and vulnerable to Y's unfair economic system.

Any counter-arguments or misunderstanding from my side?