It is very good to sell not your coins now around this time, because the value is not that high now to do it.
It will be much better if you wait a little longer and that you can sell it with a higher value, so you will have some profit.
But that is hard to know, because you never know what can happen with the value later.
That is why you don't have to keep your bitcoin for so long..you need to sell it even for a smaller profit..and just re buy fresh coins and do the same...coz if you would just keep it, you will really worry thinking if in the next years the price drops..