Mike Novogratz is in unfamiliar territory. We meet in the Marylebone Hotel, but the cryptocurrency billionaire is accustomed to staying in the Chiltern Firehouse, a luxury pad he partly owns. This time, an entire floor has been booked out by an unnamed rock star.

“Part of me wants to say that I own the place,” he says. “But that’s got to be one of the biggest d***chebag lines out there.”