If the whole wide world will see and understand that bitcoin is the best alternative way to save up their assets in times of war or difficult situations. I don't think there will be many financial hardships when war or financial crises arise in a country.
The current events occurring all over the world should be sufficient justification for many people to use bitcoin as a store of their assets, but due to how the media portrays bitcoin as a poor financial tool, people are continuing to be hesitant about it.
It all depends on the situation you are in. In a critical situation, you will need cash, and despite the war or major cataclysms, the banking system will most likely cope, since the affected party will have the financial backing of other countries. But this will not save your savings from inflation, since most likely during these periods it will be very significant. Bitcoin is good, but since you are responsible for its safety, it is also a big responsibility...