I spent most of my time doing research on many altcoins, their old price to the present value and i find out that even if you sell your tokens today leaving few tokens worth few dollars for many years can worth something. For example if you left 9$ worth of bitcoin in your wallet since 2012 you would never have imagine what it will become today, in jan 2017 you can buy 5000 pieces of Ripple at 0.007$ which costs 35$ and in jan 2018 a XRP cost 3$ which turns 15000$, there are many examples like this on CMC, remember Tron too? My point is its bad selling off all your coins, if you needed money that bad always leave coins and tokens worth of few dollars left in your wallet just in case
Its not that bad since you already enjoy a profit, the bad thing here is that if you stop investing after you sold all your coins. Its ok to hold but make sure you know where to go and you have the idea on the future prices. Holding will take a lot of patience and we dont know if the market will still go up or not, and make sure to keep on buying good coins its better not to leave the market totally.