> the next generation of organized crime bosses won't trust any apps to handle their secrets, so I guess their communication just moves offline again? Or maybe each develops their own methods in house that they know they can trust (such as shooting holes in a wall on call of duty)?

Organized crime is smart but even smart people can be dumb. They were dumb for trusting a random app and not using in-house or at least looking at the source code in the first place.

And as someone else noted, if they just decide to go completely online that’s going to be much harder