John McAfee is really nuts when he predicted that it will go as high as 1 million.
He's emphasized a few times that his prediction hinges on Bitcoin radically devaluing the USD which is a ridiculous idea in two and a bit years. People have been predicting its demise forever. It still looks pretty perky to me.
$250,000 by 2022 feels radical but just about conceivable. I certainly wouldn't bank on it but equally I wouldn't be totally astounded if it did occur.