I do not agree that it is proven. In fact, I believe we cannot say that it is ally for Ukraine against Russia, though logically, it would help Ukraine against their currency's monetary stability because of the war. But it could also help Russians as how it can help Ukrainians. Generally, bitcoin helps those people that wanted to be safe from potential risk of a currency becoming less valuable, specially now on Russia's case since they will face economical sanctions because of Putin's doings recently.