Perhaps he means there won't be any electricity anymore as a result of the war. Everything would be bombed back to the Stone Age. And so we could only use paper wallets (if people would still be using Bitcoin at all). 
Am I right, nostr:nprofile1qqs9w6y28a887vpgh37pnaxr7qa34rsy9jedyljmpqjh07tcp66r4tgpz4mhxue69uhhyetvv9ujumn0wd68ytnzvuhsz9mhwden5te0wfjkccte9ehx7um5wghxyctwvshsz9thwden5te0wfjkccte9ejxzmt4wvhxjme0cx2tuu?