Judging people
There is a saying " You can judge a person, by how he or she treats a person who is of no consequence to him or her"
This is a very accurate reflection of the character of the person, in the short run, a person may try to act very nice, especially if they think the person is important, but after some time the mask falls off.
A person who is popular or famous may be nice to be friends with, but if he or she is always trying to trick you or take advantage of you, it is not worth wasting your time on.
One of the main advantages of acting poor is that you do not have to waste time on gold diggers.