first of all this is old news and by that time everyone was publishing this type of nonsense predictions where they throw a big number at each other like a competition to see who can predict the biggest. just like now that people are competing with each other and throwing lower numbers at each other as the lowest prices!
secondly reaching $400k is nothing considering the fact that bitcoin rises have always been big like this where price stagnates for some time and the wise investors only accumulate bitcoin while others give up and sell their coins cheap. then there is a shoot up to the moon like 2017 where price jumps 2000% in less than a year.