Just hold you coins and relax. We will see a new wave of the market growth some day, but nobody would say you what exactly it is going to happen. Be patient and be ready to hold your coins whatever happens.
Isn't it better to sell now and buy back deeper? Then you'll be able to multiply the number of coins you hold, so your profit will be bbigger once the market is recovering and reaching it's new ATH level. Just passive holding and waiting isn't the best strategy to my mind.