i think bitcoin always raise because i read a post in bitcointalk.org there some one predict bit coin price at the end of this year is 15000$ and that's true also he say at the end of the 2018 it's price go's to 25000$ above i think also this prediction come true but i think it will come soon not wait for 2018 end.
RE: As Bitcoin Breaks All-Time Highs Near $18,000 Its Future Has Never Been So Uncertain