Amazon founder Jeff Bezos becomes world's richest man

Share price jump of 40% in 2017 makes founder worth $91bn leapfrogging Bill Gates with company now selling 43% of everything sold online in the USThere is a new name at the top of the world wealth league. The founder of Amazon has overtaken Microsoft’s Bill Gates to claim the title of world’s richest person.Jeff Bezos leapfrogged Gates, who has been the richest man on the planet since 2013, after a rise in the share price of Amazon ahead of its latest results due later on Thursday. C