Pershing Square CEO changes his mind on digital assets. : Bill Ackman, the billionaire CEO of Pershing Square Capital Management, claims he’s had a change of heart regarding crypto and now believes digital assets are here to stay. “I was initially a crypto skeptic, but after studying some of the more interesting crypto projects, I have come to believe that crypto can enable the formation of useful businesses and technologies that heretofore could not be created,” Ackman said in a series of tweets on Sunday night.