I'll never understand "ambitious" billionaires.

[S/V Loner]

2. I think their entire life is about...

making money. Not actual making products but the focus is making money. When they get to the point they have way more money than it is possible to spend, and all the wealth adulation they need, then their focus turns to power. Not actually using power to do something good but simply the accumulation of power. At that point they combine the two, money and power, to make even more money.
It is a sickness.