Rich keep getting richer: study

The $30-million figure isn't random — that's what Wealth-X says it takes to be considered an ultra-high net worth individual.


The richest person at every age

At 26, Frances Bean Cobain, the daughter of the Nirvana frontman Kurt Cobain and his wife, Courtney Love, has the lowest net worth on the list, with $120 million, while Jeff Bezos, 54, has the highest, with roughly $157 billion.