I do not think that it smart if you decide to sell all of your Bitcoin at once because there is always a chance that the bitcoin value is going to go up again.
So sell some Bitcoin and wait for it, maybe the price will rise again so that you will make more money.
Exactly, selling all the coins at once after seeing a little good and reasonable amount wont be a wise move as maybe the price would go even higher in next few months so holding some of it would be a wiser move then that.