Let me check my crystal ball and I'll get back to you. 

Joke aside, no one knows the bottom (or top) and those who think they do (like those people you mention) are full of shit and you shouldn't listen to them. If you are asking about the bottom because you are waiting to invest, I think that you consider DCA investment method so you don't have to worry about tops and bottoms and instead focus on  acquiring more bitcoin. On the other hand, if you are trader and you came here to ask us where it is going, then I would suggest you that trading is maybe not for you.