Assume you must evacuate your house during a wartime situation. You don't have any cash, but it's been depreciated owing to previous occurrences.
You, on the other hand, have your phone, hardware wallet, and seeds. You're in a nice mood.
The internet and cellphone networks then fall down.
How do you intend to use your bitcoin? Is it completely worthless?
As far as I know bitcoin can only be used as long as we have access to internet, meaning bitcoin is useless without internet. But the same thing can also be experienced by other payment platforms that require an internet connection.
The solution is to stay away from the war zone and find a safe place with a good internet connection if the OP is an active trader. Internet connections in war zones may be unreliable and are more likely to go out from time to time so it will only interfere with traders' activities. Find a safe place anywhere with a stable internet connection so you can use bitcoins as usual. That is a good solution in my opinion.