I am not quite sure I follow the question and am not going to vote in the poll but I think if we are talking about just taking everyone's wealth if they could get back to where they were I think a few could but definitely not everyone. While there are a lot of people who have not inherited their wealth many people who have made their living have done so because they were at the right place at the right time. For example someone the cast of Jersey Shore and other celebrities. What's to say MTV doesn't pick another group of douchebags who become popular? Or someone like Charlie Sheen, who while talented if he had to start from zero, what's to say he isn't the flavor the month and Jon Cryer is? Leaving those examples aside as another poster noted there are many who have a lot of wealth due to things like buying property and sitting on it at the right time or other things and there is no guarantee that timing like that will work out again. For people like Mark Zuckerberg and Bill Gates I imagine they could still end up doing fairly well but may not be the mega wealthy as they are now since the specific ideas they developed and timing of those developments were very critical to their success. For instance what if Zuckerberg had never been approached by the Winklevoss twins or he didn't have a partner that could provide the start up capital? What if Steve Ballmer had never been able to secure the rights to the operating system that became DOS for cheap in 1981? What if Xerox had decided to mass license their GUI before Windows? While most fortunes are built with hard work and smarts there is a matter of luck to all of them and as the saying goes success is when opportunity meets preparation. Starting at zero while many of the super successful may still have their work ethic and skill there is no guarantee the same opportunities come up again.
I think it was called "Reversal of Fortune," but I'm pretty sure it was only $100,000; buying a new truck for a (homeless) chick he liked, playing video games all day and stuff like that. Most depressing parts were his non-homeless relatives talking to him, and near the end when he refused to disclose to the producers how much he had left.
I don't think any athletes or entertainers, particularly blacks, hispanics or young women, would stand a chance. There's already a latent resentment against them because they're demographic outliers for wealth and social status; without the excess credit or leisure time that allows us to consume their product they'd just be non-union, unskilled laborers or service workers, especially since all the gender and racial lines would probably be re-drawn again (gotta protect your own and know your place). The same would probably hold for immigrants in professional/corporate positions, there'd be a little more nepotism and favoritism than would accomodate them.