I don't think you're thinking this through carefully. Firstly, cash does not take as much space as you think, $1000 is 20 bank notes. It's not a back pack full.
Secondly, if we're thinking about fleeing Ukraine you need to have transfered that money before the crisis. You can transfer a decent amount of money into dollars and be confident it's going to stay stable, you're going to have that amount of cash to leave with. If you transferred into BTC a month ago, you've lost roughly 10% of the money you transfereed just because the volatility. So you're putting this escape money at significant risk (imagine that the war didn't happen, and you've just burned a big chunk of your savings through BTC volatility). Going back to the first point - if you're literally talking about a backpack full, presumably you're talking about sticking your entire life savings into BTC? And just what? Hope it goes up?
Finally, your scheme sounds a little... risky. So Russia invades Ukraine and starts shelling your cities, you've got to travel cross country out of Ukraine, into a Polish refugee centre, possibly facing life threatening conditions. And at the end of it - better have remembered that 24 word pass phrase! Because if you forgot it, your entire escape money is gone forever!
We are talking about a war situation. There is no cash. No UAH notes, no gold, no USD notes. You sell your possessions (car, clothes, trinkets) to anyone that will pay you BTC or another cryptocurrency. You could even sell it for USD stablecoins if you were concerned about the fluctuation of cryptocurrency.
This is something people are doing. It is something directly enabled by this technology.
if you’re saying there’s no cash I’m saying there’s no Bitcoin. Getting the Bitcoin is exactly as hard as getting the cash. The only way you have either is you prepped before the war. In which case you’re better of having dollars you can use, rather than internet promises in a country with no internet.
Secondly, if we're thinking about fleeing Ukraine you need to have transfered that money before the crisis. You can transfer a decent amount of money into dollars and be confident it's going to stay stable, you're going to have that amount of cash to leave with. If you transferred into BTC a month ago, you've lost roughly 10% of the money you transfereed just because the volatility. So you're putting this escape money at significant risk (imagine that the war didn't happen, and you've just burned a big chunk of your savings through BTC volatility). Going back to the first point - if you're literally talking about a backpack full, presumably you're talking about sticking your entire life savings into BTC? And just what? Hope it goes up?
Finally, your scheme sounds a little... risky. So Russia invades Ukraine and starts shelling your cities, you've got to travel cross country out of Ukraine, into a Polish refugee centre, possibly facing life threatening conditions. And at the end of it - better have remembered that 24 word pass phrase! Because if you forgot it, your entire escape money is gone forever!