I do not believe this. Perhaps it is an unofficial article to create fomo. And if this is true, I don't think he believes what he said after what happened to many of his other words.
McAfee is a well know pump and dump speculant, so for sure he is not real Dogecoin believer. He maight only belive that someday DOGE price will rise and almost for sure he have right. If he speak about some coin, he do that only to fill his own pockets. Speculants like Dogecoin, because of his stable growth, so for sure sooner or later there will be bubble on this coin, but for sure it is not coin that will ever be a mainstream payment instrument.