It will be hard for Ukrainians to get crypto at this time because of what's happening in their Country! Cryptocurrency however could be a saving line for those who want to preserve their wealth and cash! The Ukrainian are becoming refugees by the day and I hope some of them take Cryptos with them! Now we can see the importance of border less, permissions less alternative to cash!
In a combat area this will be very difficult indeed. Currently there is still a fairly small proportion of the country in active combat. This shows the importance to prepare for such a case in advance. The best is probably to diversify into different assets such as cash/bank balance/crypto to be ready when or if such a case happens.