Elon Musk became the world's first trillionaire on Friday, following the record-breaking stock market debut of his company SpaceX. With a current estimated net worth of about $1.11tn, according to Bloomberg, Musk sits well above wealthy billionaires topping rich lists, including Google co-founders Larry Page and Sergey Brin, Amazon founder Jeff Bezos, and boss of French luxury goods group LVMH, Bernard Arnault. Musk - who first made waves in the tech industry in the late 1990s - hasn't always