No one can exactly predict Bitcoin price in advance either he is Blockchaing expert or Large investor. Bitcoin price is now around $7k and there is a possibility to reach over $10k by the end of this year not sure.
You are right dude,even expert in crypto cant predict what really happen to the end of 2018 for bitcoin.But ofcourse all we want is before 2018 end bitcoin price will increase and it will stay to highest value in 2019.I hope it will happen because i know once it happen it will gain more profit.