I grew up in a small town with a lot of old money people and some Nouveau Riche. The old money people, almost invariably, were friendly comfortable real people. Yes they lived in large fancy houses overlooking the water, and yes they had expensive toys, but they were also welcoming and positive people. The new money people, again, almost invariably, were snobbish conceited and seemed otherwise ill at ease within society. They drove fancier cars too fast on our residential side streets, lived in the 70's version of McMansions, and flouted their wealth in the face of others. It seemed to me that they were trying to convince everybody around them, and perhaps themselves as well, that they had "arrived" and that they were "somebody".
I now live in small rural somewhat isolated community with mostly blue collar and a mix of old money and new money people. Forty years later I still observe similar differences between the old money and new money. The new money seems much more to have a sense of entitlement. They want things their way regardless of societal rules.