I personally don't believe it will come to that but Putin has been increasingly hostile and unstable. Just comparing his speeches from a few years ago he doesn't seem as measured and calm . I think he will have an "accident" before anything happens. This is a man facing his own mortality who's having a crisis and desperately trying to secure his own legacy. The oligarchs want to live and spend their money in comfort.Think about the nukes. Why would they completely obliterate something they want? It’s never gonna happen.
Calm down and don’t read fear mongering stuff.