Selling is not a good step for you to do, you better buy eth again while the price is still low, at least it cannot cover the losses you experience. But if you sell it you will lose everything, a huge loss.
People will stop buy again while he still hasn't made a profit from what he's holding. It's easy to say that, if it is you, you will definitely be preoccupied with the panic feeling, because the price has dropped so deep and you have imagined how much loss you have received. What you want to do is just how to minimize the loss.