I am only trying to see how a patient, and open discussion can lead to informing someone who is VERY INTIMATELY connected to the current system and how he can be converted to see the light of Bitcoin as we all do!
Maybe it can't. Your friend doesn't need to change, he can go extinct.
As for the Bitcoin is useless during a state of war premise I'd say there was a time around 10-15 years ago when I'd maybe agree with that but today I just can see major economies allowing the destruction of something like 15-20% of their GDP by gangs of people known as governments through nationalizing all ISPs in the area they rule through violence and cutting off all the other areas so I don't think I'd accept the premise that Bitcoin automatically becomes useless in the state war. For example the land area knows as the US is at war right now in several countries and yet Bitcoin is perfectly useful to almost everyone.