could be possible. But americans media loves to report on the exceptions to the rule, and americans love to believe they can all be that exceptional.
Neither are realistic.
For example, everyone likes to think they are the next Bill Gates, Eric S, Jerry Yang (though probably not recently). Very few actually are.
Also, a nice car is hardly an indication of true wealth. A good portion of americans lease cars, because it’s the only way to get into an expensive car for them.