there has been way too much chatter referring to Putin being very sick, even terminally ill for there to not be some grain of truth to it. If true, this makes him even more dangerous and erratic, much more likely to do what your musician friend from Romania suggested (nuke a Ukrainian city just to show he would... god forbid he would choose Chernobyl...) The best thing I think we could do is to use the Starlink services (Skynet, ironically...) and get counter-information into the Russian people. Putin's inner circle is already starting to turn on him, as evidenced by the large turnover in people in his cabinet. They would just need to have a much more sizeable movement of citizens showing civil disobedience and protesting for them to remove Putin from power. No matter how careful he would be vetting his advisors, there will be much more cagey individuals in there capable of hiding their allegiances from him.