i heard that bitcoin will be $2000 at the end of 2017 so are you sure that bitcoin will be reach its price to $2000 or it will be never happen ?
Nobody knows is the simple answer.
Even if someone says that they are a pro trader or an experienced bitcoiner, it does not mean that they can predict the markets 100%. Sure, they may be able to predict that bitcoin is going to rise by 100% in a year but these predictions are more like educated guesses.
My guess is that based on the enthusiasm the bitcoin community is showing, it is very possible that well see a price level close to, if not $2000 this year.