Only you yourself can answer to this question. If you feel fear then sell immediately. This "game" is not for you. You are not able to hold its "weight". Sell all your bitcoin and forget it. Even don't follow. Because if one day the price of bitcoin will arrive amounts unimaginable for you in this moment your for sure will hurt yourself for that what would do now. But even if go down yet will feel a little sorrow about it if have been really a follower of it and not simply a speculator who have bought some of those with the aim to earn from its volatility. Bitcoin is not simply a currency. It is much more. Try to understand this and the why of this. If you will have such knowledge will not never do such kind of question because will be yourself to give you the right answer what to do in every moment.