Pretty simple, if you're from a region that has conflict, you're better off with fiat
Actually in case of that what you need is food and shelter because neither fiat nor bitcoin are going to prevent starvation or stop bullets.
Not to mention that you can't really store large bags of cash in your home because the banking system is going to be the first that will get hit. You can see how Russia performed a large scale cyber warfare against Ukraine over the past couple of days that included hacking their banking system. Meanwhile bitcoin is not and can not be affected by this.
The banking system in Ukraine is still working without interruptions. In some areas, there are only queues at ATMs. The situation is tense, but after yesterday the occupiers received a worthy rebuff, the patriotism of the population is already going wild. People help the army with money (only yesterday more than 20 million hryvnias were transferred to a special account of the National Bank of Ukraine), food and transport, and en masse join the ranks of territorial defense. Although Ukraine is significantly inferior to Russia in military potential, it is unlikely that it will be able to defeat such a people. Ukrainians do not intend to return under the yoke of Russia.