JPMorgan’s Jamie Dimon may have bitten off more than he could chew this week, after he escalated his long-running spat against bitcoin with a fresh challenge that left the crypto community scratching their heads.

In a wide-ranging 11 October discussion held by the Institute of International Finance, the bank boss made headlines when he said that personally he believed bitcoin to be “worthless”, even if JPMorgan is preparing to give its clients access to the market.