It means that his financal advisor is someone wise. I would believe that the bitcoin price would not fall anymore and it is right time for invest. And ofcourse this is very good news because the famous people would give our market great benefits when they buy bitcoin or cryptocurrency.
Bill Cosby is a well-known Hollywood actor, of course his financial advisor will not give arbitrary input without calculated data and predictions. So. I believe that in the future bitcoin will rise again, because trust is still high in the community. Bitcoin will become an expensive digital currency.