The richest man I have ever met (and associated with) was worth just a tat under a billion.
I was in Puglia, Italy, and my friends and I used to go to a particular night club; it was not the “hip” club in town, but the service was exceptional and our privacy respected.
When I first saw him there, I wondered why they let him in there. He was ridiculously under dressed wearing a singlet and thongs, he told people he is a fisherman and had the biggest belly laugh. Once I got to know him, I learned that besides other businesses, he owns one of the largest fishing companies in the world, and when he feels like it, he still goes out to catch fish himself. He had a great sense of humour, a real passion for life, and was a very generous man.
So you see, wealthy men have their own tricks as well. Never underestimate someone who does not look the part, just because you don’t know what signs to look for and how to recognize wealth. Learn to spot the difference between a "show off" and wealth carried with dignity.