Does "thinking rich", carrying yourself like you are, and surrounding yourself with rich people make your richer?

This is a psychology and thought question. I’m asking this after watching something like “The Secret”. Can thinking rich and surrounding yourself with richness make you richer? Kind of like reinventing yourself? I once knew a guy who reinvented himself, and he even changed his name. He started hanging with a new crowd. If someone wanted to be better off would it be a smart or dumb idea to carry yourself this way? Or is it just superficial? For example if someone wasn’t happy with their life and they wanted to reinvent themselves. Could moving to a new city(like Beverly Hills), dressing nicer, and carrying yourself with more prestige bring you closer to having the life you want?

The Secret, and many other sites also say that if you always worry about being poor and not having enough, eventually that is all that you will bring. Thoughts?