There are videos capturing lots of explosions going off simulataneously. Since pagers already can recieve messages and these devices were deeply infiltrated, they likely added a special trigger message to set them off. THis could also allow other scenarios, like only setting off one (for whatever reason).
Bitcoin has a marked capitalization of about 30 billion USD. A S-400 air defense system costs 1.2 billion USD. So you could trade 25 of those systems using the entire “supply” of bitcoin. Russia calimed to have about 450 of these systems before the war. Even if they would use bitcoin for trading military equipment, cryptocurrency simply does not have the volume to pay for a meaningful amount of equipment.
Unfortunately some people have less empathy than others. They learn mostly via experiences where they are hurt themselves.