Elon Musk is not like most multibillionaires. The first oblique hint that Tesla’s eccentric chief executive was contemplating another audacious, market-shaking move came via a risqué, Yuletide social media message.
On December 20, Musk tweeted a cartoon image depicting himself as a devout monk trying to live a “normal productive life”, gazing at a woman in a provocative pose with “bitcoin” plastered over her posterior.
The meaning of the bawdy tweet became clearer this week. On Monday, Tesla announced that it had spent $1.5bn of its cash reserves buying bitcoin, and would soon start accepting payment for its electric vehicles in the digital currency. It sent a frisson of excitement running through the world of cryptocurrencies.