The decision is all yours. You have to rightly assess if you want to buy more coins for future profits, or the profits you have right now is good enough to sell your coins. However, for most of us, I believe that buying more and hodling would be the best thing to do in this current market condition. Bitcoin is gradually in sale, so might as well take advantage on its discounted price. Because this opportunity we have at the present might never be available in the next couple of days.