Thats a make me a hero prediction. If it happens hes the big hero. If it doesnt happen no one will remember he said it. If they do remember he can just say it might take a little longer do to bla bla bla.
Also the ones saying that do so in an effort to scare people away but if that were to happen I will not be scared I will be doing everything I can to get as much money possible and invest before bitcoin goes up, it will be incredible to be able to buy bitcoin at 1k everyone that lost that opportunity could have another chance to make money with those prices.