It is not suggested at all because you can make a lot of loss with panic selling i would suggest to just wait till it grows again and hold your coins if it goes down because it will go back up in fact i would even buy more bitcoins then.
OK, it's always about HODL if you do not control your money in a smart way. But panic selling is about panic. Panic is time when you're no more rational. When you panic you act impulsive. You just can't fight it with logic.