It up to you whether you sell or not? But as its price is slowing down it does not mean that it will continue. So, you can wait for making more money.
The prices of biotin keep increasing all the time and we all know that without dumps, we cannot have great pumps, without falling down you cannot learn flying, same is the case of bitcoin. Well it is up to the investor. If he needs money on urgent basis, he should or he cans ell off bitcoin but if there is no urgency and the investor is selling off bitcoin out of fear, he should think twice before taking such silly step.