Micheal Saylor is a Microstrategy and has been buying tons of bitcoin and just like everyother investors who have shares in other investments, they all talk and predict how far a price can go and they do that to ive confidence to others who have invested on similar thing especial now that there is fear in hear and there of bear market.
I think these are just specualations, but I think we will see $64k again because judging by that 4 years he stated, we would have seen another bull run after the next bitcoin halving, we all know what usually happens after that, bitcoin price will soar into another level.