McAffee is known for his drug usage and hooker adventures, he may have been high, but the math is there, it may grow in an exponential fashion and then we are not ready to see such growth because our minds are not really hard wired to think inters of algorithmic exponential graphs, a lot of people are judging bitcoin with the linear graph on and think it's a bubble which is a big mistake.
Those linear graph analysis were created with stock markets in mind, stock markets which are under heavy regulation by the State, with its taxes and policies.
Bitcoin have near to zero regulation in most countries, it's a alien monster in the room, so anything is possible.
This guy gets it. You can't use the linear graph for bitcoin, because it's a global asset, it is really something unique, massive amount of wealth can flock in and create an huge price increase easily.
The people using the linear graph will always see an huge green candle in all time graph and will always think it's going to crash but it will keep going up.
someone made a nice comment on ZH : take on the bet, for let 's say 200 K. Buy 100 K BTC. No matter how it ends, you win... . 
