By his own admission, Lee Cooperman still does not understand Bitcoin (BTC), despite its being up more than 300% since early December 2017. Speaking to CNBC on Thursday, the billionaire investor alluded to people his age having a hard time understanding Bitcoin, adding: Cooperman’s statements on Thursday are in keeping with previous comments about Bitcoin. Back in December 2017 when BTC was on a bullish price advance, Cooperman expressed his confusion about BTC.