Image from John McAfee 
Last year a twitter account asked: "so 1btc 500k $ within 3years?"
McAfee responded : "if not, I will eat my dick on national television.
12:02 PM - 2017 July 17th"
After he raised his forecast to 1 million USD!
2017 Nov 29th :
"When I predicted Bitcoin at $500,000 by the end of 2020, it used a model that predicted $5,000 at the end of 2017. BTC has accelerated much faster than my model assumptions. I now predict Bircoin at $1 million by the end of 2020. I will still eat my dick if wrong."
His wife has to be worried here :D
But she is not!