Well, he is speculation and investing in bitcoin since a long time now. I remember, he also proposed a plan about a 10 PH/s mining farm earlier. However, the price he mentioned about feels like over speculating and over valuing bitcoin. Because to reach that price, bitcoin market cap should be more than the GDP of USA and that is really tough to happen.

So I am not believing that bitcoin will ever reach that milestone, but yes, bitcoin will go up much higher than its current level for sure. So whoever is planning to invest in bitcoin, please start now or else you may loose a bit from your future profits.