Why would Putin think his life is over? He's 10 years younger than Biden. And, have you ever heard the expressions, "better dead than Red" and "give me liberty or give me death"? People often believe that deeply held principles are more important than mere survival. Similarly Putin might believe that establishing Russia's strength and border security is more important than any short term pain Russia endures. In other words, there's other ways to look at this than as just a pure boss move for his own ego and pleasure.
He might think his life is over because there are very obvious physiological effects that occur when you are 69 years old. As a person who does not have problems and gives problems to other people it may frighten him to realize he is going to die.
Sure there are other perspectives and possible motivations for his actions. But it's the idea that he may not care any more and might do anything that I find scary. If he's willing to risk full scale invasion across all of Ukraine after the international focus that preceded it, would he also be willing to launch supersonic nuclear weapons? In his televised statement he said Russia is ready for all outcomes.
For the USA what probably worries me most is cyberattacks. The USA is such a soft target. Our government can't even secure it's systems after a decade of laws, warnings, bad reports, and actual attacks.
I do hope I'm wrong and Putin is actually sane and has a strategic plan that makes sense for his country.
