This is the moment, say the more breathless cryptocurrency fans, that digital currencies go mainstream. It’s the moment that the bitcoin price “goes parabolic”, they claim. It’s the moment the Luddite cryptosceptics have to stare at their shoes in embarrassment.

Unless there is last-minute hiccup or change of heart by the regulator, the US Securities and Exchange Commission, the first exchange traded fund linked to bitcoin futures is set to start trading within hours.

Suddenly, investors will as easily be able to put their money into something approximating to bitcoin as they can into any other listed share or fund. The new ProShares Bitcoin Strategy ETF will sit in their retirement accounts and look no different to any other listed, traded and liquid security.