Selling is not good because the future will be good for the bitcoin and the price will rise to a higher amount for sure without any doubts.
Its just that we need patient and hold them for a while.
So then how much do you still want to keep the coins? Until what value?
Well for me the best price to seel is around 800 USD. Then the price will go back and i make sure to rebuy.
I have seen a downfall with every rise. I expect it to go the same the next rise.
It depends on what price you have bought your coins at, but if your selling target is $800 then you can't do anything other than waiting and holding. If you buy at todays prices and sell at $800 you'll make a nice profit. You just need patience.