It's been said that imitation is not only a great type of flattery, it is also the best way of learning and modeling on the success of others. If it is financial success you are looking for, what better role model could there be than a billionaire?<br /><br />What Billionaires Know<br /><br />Though their world views may have tiny in common, billionaires like George Soros, John Paulson, and Carlos Slim have all admitted to holding a part of their wealth in gold. Even Warren Buffet, who personally prefers what he calls "productive investments," admits that gold has served investors well