Most likely the bitcoin will rise to a pretty nice number this year but 5k is just too much and I can consider it right now as unrealistic.
This obviously will be very difficult to reach $5000, in fact I think it will never happen. you can see, even to reach $1k again it takes a very long time.
$1k can be achievable at the end of the year and if price goes higher at the time of halving then we can expect it will be much higher by the end of the year 2016.
The halving could double the price to $800. The general mass adoption can raise the price even further, maybe to $1000.