You should hold your coins first, because the price is still low. but if you can not wait, you can sell it now. but my advice do not get used to sell the coins lower than the purchase price, because it will be a bad habit that is difficult to remove.
of course, because soon the price of coins on experiencing a very good increase, especially those holding ETH and bitcoin, the profits that will be obtained are large later. and my prediction at the end of the year coins will soar in price
I agree with your opinion, I also think the same, when the market price is down, I keep holding it and keep it, I am sure that until December 2018 there will be a price increase.