The "money disease" shows up in proportion to how much more prominently rich you are compared to the people you normally interact with.

The "money disease" is where rich people come to believe they are smarter, more charming, and more funny than they actually are.

The money disease happens when nearly everyone you interact with knows that you're at least two orders of magnitude more wealthy than them.

If you're less than that, then many people won't know, and will treat you roughly normally.