There have never been more billionaires. So what does it mean to be one? : (Bloomberg Markets) --A denizen of an elite charity ball in New York found himself disoriented one night, not by the rapid fire of flashbulbs around Victoria Beckham or by the glittering night sky projected on the walls, but by the absence of his usual crowd. “Who are these people?” he asked with more curiosity than disdain as he surveyed the room of more than a thousand guests, eager for an introduction. As the ranks of the rich swell, moments such as these are increasingly common.