I myself don't know what will happen to the value of bitcoin in early 2019, because indeed the movement of bitcoin values is difficult to predict.
But if in the next few months there is a lot of positive news about the value of bitcoin, I'm sure by the end of this year its value will be high and even in early 2019 it will be history for the value of bitcoin.
But i don't expect too much, just praying and waiting for positive results to come in early 2019 on the value of bitcoin.
It is very hard to bear this tight situation of bitcoin market, because many people have small investment and they cannot wait for long. Like the previous people think that the next year will be good. I also hope so, but lets see what happens just wait for few more months. People discouraged in this year and they say that bitcoin is a bubble and nothing more.