Fake rich people need to make good money to keep up their materialistic lifestyle.
Fake rich people need you to comment on and care about their things – such as their home, their car, or their job. They’ll often talk about it in a way that prompts questions and discussion.
Love to one-up others
This goes with the point above, but fake rich people enjoy showing that they are doing better.
They won’t actually say these things, of course, but they’ll drop hints.