Thats good that you do have diversified portfolio and regarding on that coin i do see it on the past but i didnt decide to put up money on that one. Sad to hear for your loss but you are not the only one whos experiencing loss and lots of traders do have this kind of situation. I cant say that you should cut losses or holding even more. If you are a type of a person which do love to risk until the last price movements then better to hold. If you feel its the best time to cut loses then do it,it would really depend on you.