This year J.B. Pritzker, the governor of Illinois, has in one way lost to Donald Trump. Until recently, Mr Pritzker, a scion of the family that runs Hyatt Hotels, was America’s richest politician. In his brief speech at the Democratic National Convention last year, which Mr Pritzker brought to his home town of Chicago by means of his chequebook, he even joked about it. “Take it from a real billionaire,” the governor riffed. Mr Trump “is rich in only one thing: stupidity”. No longer. Thanks to his forays in cryptocurrency, the president is now a lot wealthier than Mr Pritzker.