It's very difficult to catch the right moment to sell a coin, expecially in this period...crypto world has too much volatility and is very uncertain..personally I'm holding 90% of coins I bought, I regret to not have sold many tokens gained from bounty campaigns before but now it's really too late. On the other side, I'm happy to hold major coins like Bitcoin Ethereum Neo Cardano etc.. because I believe in crypto foture and I think that these coins will rise again more than before.