If you want people to take you serious, then at least put some effort into making yourself not look like a clown. It's pointless to speculate about such insanely high prices while we haven't even been close to reaching the $10,000 level yet. If he would say that we would reach $10,000 within 10 years, I would strongly support his statement, but how can I do that with $1 million? Other than that, I do agree with his statement that people should allocate a certain percentage of their wealth to Bitcoin. People have been looking at the price reaching $1300, $1400, $1500, $1600, etc, and started thinking it was too late to invest - look where we stand right now, it's never too late!
I agree with you, $1 Million seems unrealistc, but $10k 5-10 years is quite possible.
But if we let us to indulge in fantasies for a while we can try to imagine what will happen if bitcoin will replace all the money in the world. There are roughly $75 trillion in the world right now. Since it is a very rough estimation say we have 20 million BTC.
75 trillion / 20 million = 3.75 million
So in that case 1 bitcoin will be worth of $3.75 million.