Unless Wagner publicly denounces or executes Prigozhin, Putin wouldn't dare touch him. He needs that meat for the grinder and those guys obviously have all the kompromat about Russian ordered Wagner actions around the world.

Remember, they aren't just active in Ukraine, they have deployments all over the world. And up until now, Russia used them for plausible deniability actions.

Wagner probably carried out quite a few of these "mysterious suicides" Putin opponents have been running into.