As far as his personal wealth, this is a Western Intelligence legend. They can't even resist tipping their hand in their own writings. Take this story, for example:

An investigation on how Vladimir Putin profits from the vices of the Russians (2/28/2023)

In addition to the overblown artwork, we get this sentence right up front:

And thus begins an incredible story about money and vices.

Yes indeed, it's just a "story" and it is not credible. Take a look around for evidence of this wealth. Do you ever see it?

No, there's no trace of it. He wears ordinary dark suits and what looks like a Timex watch. The Presidential plane is the size of a 737. No photos of him in his mansions or on his yachts or with his collections of European sports cars and race horses. Nothing.

His office is clearly set up for work, not ceremony. I'm sure he's taken other days off in the last ten years, but I've only seen two days documented. Both were simple day trips into the woods with his friend, Defense Minister Shoigu. There was one other "working" day he spent working out and eating lunch with Medvedev.

As far as Putin "changing", he was switched out with a body double starting as early as 2010, and the last time I saw the real Putin was in 2013. Anyone that does not take this into account I feel cannot really be said to be paying attention.