He didn’t stop to brag or boast but did make one acknowledgment of his success after the author of a top-selling biography shared his surprise, saying he never expected he was writing about the future richest man “because his companies were so risky”.
Mr Musk agreed it was “true” that his was one of “the most unlikely business stories of all time”.
Stock in Tesla rose to close at $US816.04 ($A1050.37) on Thursday, adding to Mr Musk’s net worth and also helping the company overtake Facebook to become the fifth biggest by market value, behind Apple, Microsoft, Amazon and Google.
This could clear hurdles for environmental reforms which the electric vehicle maker would likely benefit from.
Tesla’s shares are worth more than 10 times what they have been at some points in the last year. At one time – which you’d love a time machine for – the company’s shares could be snapped up for just $US70.10 ($A90.23).