An actual revolution in a country will lead to instability in its economy and currency. Due to this instability in that currency people may shift from paper money to fiat currency. When that happened it will lead to a surge in bitcoin prices.
That's right. It's not possible for people to use or continuously support cryptocurrencies because it's heavily reliant in the use of the internet. And in a war scenario, I don't think that keeping such would be a practical way going by because it's better to prioritize food, shelter and clothing, and basically, surviving rather than other secondary stuff. I don't even think money would be of use in times like that because as much as it's valuable you can't use them to eat, keep you warm or provide yourself a safe place in crisis situations.