I am not expecting for a record breaking price in the end of the year because every year has its own difference. As of bitcoin's slight decreased I can't think of anything that caused it, maybe it's just a usual movement of a volatile market so don't be bothered and keep waiting.
You may not expect a record higher price by this year end. But, there are plenty of chances for a new all time higher prices before this year end but which may not hold for while like what we have experienced in the fourth quarter of last year.
At points like this, anyone who is even considering on selling what they have been holding all these while is making a silly mistake and would even set such a person into a deeper level of emotion in the long run if the market even decides to pick up in the short term. What anyone should be looking forward to now, is to at least be buying more which would make them even more relaxed considering that when the market eventually picks up, they will really be swimming in huge profits.