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7 billionaires and their crazy-ingenious ideas

By: Bryan Nelson on Sept. 25, 2013, 11 a.m.
Global currencies and canvas bags with dollar signs on them

Photo: William Potter/Shutterstock

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Let's make lots of money

Billionaires are known for being an eccentric lot. Of course, having more money than could possibly be spent in a lifetime probably has something to do with that. But for many of the world's billionaires, it was their wacky ideas that made them so rich in the first place.

It's worth keeping tabs on the ingenious concepts backed by the world's richest people, so here's our roundup.