Or - the military might turn their guns on Putin. They (hard-core communists) tried it in 1991 but failed. But, it did lead to Boris Yeltsin taking over, and the fall of the USSR.
I’m guessing/hoping that this Ukraine war will be settled soon with negotiations. I’m also guessing that Putin has a strong hand on things (internally) for now. His health is an issue it sounds like, so who knows how long Putin has to keep that power.
Why should the military turn guns on Putin? Do you think the next leader is going to be a liberal democrat? Both premises are preposterious.