Thinking that anyone with significantly more money than you are alien beings with evil tendencies is an unhealthy belief. It's both wrong and self limiting.
If I had a couple of multiples of what I had, I'd build a bunker, but I'd still much rather live on a planet where I can go outside, play golf, visit national parks, do woodworking in the yard etc.
The bunker is a backup to protect against outcomes you can't control, not the plan A to intentionally destroy the world.
It's not about them opting to aggressively pursue world-destroying policies, it's that, if some decision they make carries a long-tailed world-destroying risk, the weight of it in their mind is lower if a scot-free outcome still exists for them in the event that that happens. This is a psychological influence that would exist just as often in the poorest as it does the richest, it's just that the richest have the means to avoid the negative outcomes of their lack of more cautious foresight.
If I had a couple of multiples of what I had, I'd build a bunker, but I'd still much rather live on a planet where I can go outside, play golf, visit national parks, do woodworking in the yard etc.
The bunker is a backup to protect against outcomes you can't control, not the plan A to intentionally destroy the world.