I would not suggest you sell. At the moment you have a paper loss but if you sell you will realise that loss. Is it possible to change into other coins that may increase faster and above the price you paid? If you believe they will not drop further then if you do not exchange it is probably best to hold for recovery. Many investors in stocks would buy more after a crash to lower the average price paid so recovery price would not be so high. Only for the brave though.