Novogratz’s crypto bets had coaxed him out of self-imposed retirement, and soon sprang him back onto CNBC and Bloomberg. Late last year, as the G.O.P.’s tax bill barrelled through Congress, he called Steve Mnuchin, the Treasury Secretary, an “idiot” (spelling out the word, for good measure) and rebuked Trump’s economic adviser Gary Cohn for the tax overhaul, saying that he “shouldn’t be able to live with himself.” Both Mnuchin and Cohn had been partners alongside Novogratz at Goldman Sachs, and this made for an unusual breach of Goldman etiquette.

https://www.newyorker.com/magazine/2018/04/16/a-sidelined-wall-street-legend-bets-on-bitcoin