No one knows, and no one can be sure what price it's going to end up. Though I've read a lot of so called "experts" that are predicting $25,000 at the end of 2018. I have no comment on that. It could be $50,000 it could be $5,000.
I agree with you, because the price of Bitcoin is fully owned by the users. So there may be no certainty about the Bitcoin price at the end of 2018.
we'll see later but we all hope Bitcoin prices will continue to grow.