You should never panic, you need to turn off your emotions, only common sense, you do not have to go on about your feelings. and then everything will be fine!
then what if you lose your assets in your swallow? are you going to panic?
Im not yet experience being panic for i am always ready with the outcome of my ico because i always put in my mind that bitcoin is a great help of mine and even its price goes down im still didn't do panic selling for i know that it will rise again on its price and instead of panicking ive hold it and im waiting the right timing to sell it.