Earlier quoted context omitted.
I dunno. They can always become the next Google or Facebook and do something with THEIR money. These mega-corps grew from nothing in only ~20 years. The new rich of America is NOT like the "old rich" of Wall Street. Basically any no-name nobody with 5 guys working in a basement can become the next Microsoft, Apple, Google, Facebook, Youtube, Pinterest, Groupon, Zynga or whatever.
It's hard to take this comment seriously. It's clearly absurd, because otherwise we'd have 100,000s of new multi-billion dollar corporations, instead of a small handful. I'm starting to think it's more likely that you meant it sarcastically.
There was a recent study on the "new upper class" of the USA. Most of it is "new money": first-generation millionares and first-generation billionares.