I don't think extremely poor or wealthy people are not excluded in this matter since in this world in order to survive we all need is money for us to buy our wants and needs.
A mistake the poor make is that they follow the rich and try to belike them when they don't understand the secret the rich keep from them. The rich might be spending money and buying all the things that they want but to you it's unnecessary but to them they are very necessary because they can use those things they buy to get into places that they won't have been let in. The rich might buy a yacht and be let into the club of yacht owners that'll get them opportunity to meet other rich people and they get ideas and other business opportunity that'll make them richer. To you that yacht wasn't necessary and a waste of money but to the rich guy it was an investment and he can always rent out the yatch and be making money as well
Yep, they utilize their entertainment to grow their networks. It's a smart way to join in a group of people that has the same status level that you have. Having good connections is one of the way that rich maintain their richness. Rich people just enjoy their money but at the same time thinking about how they can earn something from it. This is why most of the instant millionaires can't be more rich because they only want to experience the money, the way that millionaires lives, most of them just enjoy it at most but don't think on what will they gain from it aside from the happiness from the experience.