Let's compare it to the situations Ukrainians found themselves in.
They needed to flee the country, but there was a chance border guards would steal their money if they found them carrying a lot. The same would happen if they were found carrying a bag of gold.
If they happened to enter the EU, they wouldn't be able to fly anywhere because you cannot carry a lot of cash and valuables like gold, jewelry, including watches, and cash. AFAIK the legal limit is somewhere around 20k EUR. So, in a situation where you have to migrate with a lot of money, bitcoin is the obvious choice.