Wait until you will be needing the money as base on the price movement there is a big chance that the price will still grow in the following days.
But the decision still yours, if you are already satisfied with the current price then you can sell it now and withdraw it so you don't have to worry anymore about the incoming price of bitcoin as no one can really predict the market price. What is sure is that, the price will surely goes down or up.
How can you be sure that it is just in a following days? Even a professional bitcoin holder can't predict when will bitcoin will grow its price again. No one can measure how volatile the bitcoin is, so it is very hard to make a statement on when is the right time to hold and sell. This is all about taking a risk no matter what happens. It is possible if you sell in context like when you really need the money for some purposes. It depends on the circumstances, but that's true that also prediction is very uncertain.