If you have to pose behind a luxury car to show you are successful trader, then chances are that you are not. Most of these so called richest forex traders in SA, are actually into the business of motivation. They just want to motivate you to buy their courses & keep trading but they are not in any way rich.
I believe some forex brokers are paying these guys to market and attract more customers; its no wonder these guys will always recommend a certain broker to you.
If at all they have any money, it is the money they get paid by brokers to do this marketing and show off online.
That's my opinion though, I stand to be corrected