is it possible for bitcoin to be $ 15000

in my opinion, the possibility is very small, but we look at the beginning of 2019 whether it happened or not.
Dude, there's no need to look.It seems impossible for the next time it comes to prices.The market will not be easy to collect.So there is no need for enthusiasm for 2019.
I do not really look at it and have lost patience to see it rising again but let me tell you this that it is not over yet. We can still go high. There is something called growth and this can happen when some the indicators affecting the coins positively are positive. External involvement matters a lot and the whale making happen their economic activities can also move on the market to the next level. If you are aware about the business cycle and its phases, you would come to know that its not over yet.