Every thing Mcaffee mentions gets pumped and then usually dumped. Why are people this stupid? He has made himself a prophet in the cryptosphere and is using it for making profits.
He mentions coin of the week and it grows by 20% in minutes.
I normally try to avoid quick "buy tips" no matter from where they come. Those normally correspond to people who have taken stakes in some coin and want the rest of the people to do the pump from them. Trust only your own research and reputable sources for news.