it depends on your analysis..always holding is good.if the coin price is down waiting for target price.take the risk.there are so called correction price.
From my exp. I see any coin can survival will recover. Hold always win but If you see any deal better just sell all to invest then buy back later
Some traders are playing safe, some of us are selling their bitcoin immediately just to not lose their bitcoin, they we're always selling it once they buy with a lower cost and sell it with high amount, with that case they can gain profit even if in small amounts. It is still safe to do than to risk.