McAfee is a strange person who is fighting against everyone all the time, but I do not trust him, because he is very suspicious person. I remember he announced a promising coin each day during a week and a lot of people have lost their money.
It is up to the user if he will believe things from him. We all know that crypto investments are a very high risk investments, so you should do your own due diligence before plunging yourself into this area. Shadow trading is not really new. But one should know the background or at least the performance of the trader that you want to follow to shadow his trading movements. Not all traders are successful all the time they are in the trading mode. Check for their success rate at least.