Nothing specific stays in this article, no solid explanation why his prediction can come true. Million dollar for bitcoin is such a SF scenario, especially taking in consider the date that he took for his prediction. I don`t think that anyone take this kind of predictions for serious.
Hes trying to build something out of this prediction and for sure, many investors will not believe on this since he already done this kind of prediction before. Giving the exact date for a million worth of bitcoin is useless, there should be a strong basis to support this prediction, and not for being famous.