We should trust our experience in trading even though the situations got worst, and I don't think panic selling is the solution. What will happen to your future profit if you sell it all due to you're panicked? That's why we should stay stronger and keep the faith burning so we could stand against negative speculators.
I agree with taking action or decision because you are panicking it will actually make you even more lost, then if your experience says to hold it then hold on to it, I think also in making the best decision based on the experience you have may hold or sell.