Jeff Bezos founded online bookstore Amazon in 1994. It was a risk, as the business which was initially operating from Bezos' garage, was up against big bookstores such as Barnes and Noble. But Bezos' gamble and belief that people would want to buy books online soon paid off, and Amazon diversified. It now sells everything from TVs to groceries to TV content, while Bezos is now the richest man in the world with a net worth of $201.6 billion (£154bn).

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