Tesla boss Elon Musk pursues his most unlikely goal yet: a $55bn bonus

Some say the firm is already overvalued at $60bn. But its founder’s vision is now truly ambitiousRacy valuations for loss-making businesses are nothing new to hard-nosed Wall Street types. The dotcom boom of the late 1990s and early 2000s made a fortune for the brave souls who backed a plethora of small start-ups that are now giants of the stock market, such as Apple, Amazon and Facebook. Plenty also lost their shirts with punts on the “next big thing”.Elon Musk knows more than