He is smart, there is no doubt about that but I guess everyone knows that no one could predict whether a coin is going up or down. The coin that he advertised may be indeed good as he claimed but that is not necessarily supposed to show in the price, we have coins that are completely useless and yet on the top, and some of them have a unique use case and active development but simply didn't make it. And If you're referring about the tweets that he used to make in the past (not sure If still doing it) then I believe he's being paid for that.