at the moment where Russia has gotten different sanctions it will be wiser for Russian citizens to switch most of their assets to decentralized cryptocurrencies so they have a link to bounce back to after the war.
But they need to live and survive the war. what if they were fired from a company that left Russia because of sanctions? they have no income, so they have to spend their savings on a living, the question is how many are there who can live normally and still save some bitcoin for after the war.
in wartime, some ordinary things become very expensive and unattainable, the money is spent quickly.
For Ukraine i guess NATO and other world organizations will make donations to help rebuild the nation
for the most part, you are wrong here. Yes, there will surely be some help to Ukraina from USA, EU... but it will mostly help through borrowing. Loan with a low-interest rate, but still a loan.
btw. Nato probably won't help much in rebuilding. they don't deal with it and their essence is something completely different.