Claudette Barius/HBO
- This year's new billionaires got more riches from inheritance than entrepreneurship, per UBS.
- This is the first time the Swiss bank has found this discrepancy in nine years of research.
- US tax code enables the rich to preserve their wealth, even for 1,000 years.
You can't take it with you. But that doesn't stop billionaires from hoarding their wealth for the next generation — or the 20th.