Maybe is all a grand strategy to finally bring bitcoin over 1000000usd and not have to eat his own d...k :-)
First with crypto and then with btc right?
LOL. But the thing is John McAfee is really good at hyping any coins specially bitcoin. He has still a lot of followers eventhough the guy is really eccentric but we can't take away the fact that he is a genius as well. So a lot of his die hard will follow what every coins the guy bought, everyone of his fan boys will pump as well.
But personally, I would follow the guy though, he may be right, but at the same time he's predictions will go out of the drain. Its better to just join the ride and then exit on time. We also have to remember that he is truly a bagholder of bitcoins, that's why he is making outlandish predictions about it so that he can take profits in the future.
He's clearly doing it for his own benefit, but it is unquestionable that his word has a lot of power in the speculators. Therefore, as long as you can get his tips quicly, I think it's a good deal to follow him.