Ask yourself first if you are going to do long term investment or short-term investment and also what is your plan? If you are going to make long term investment then my suggestion that you should keep your BNB. If you checked the latest market price, you can see that the price of BNB also did some rally so for sure that it already made you a profit if you got that BNB from long time ago. But if you are a short-term investor then it is better to sell it and buy again after the price of the BNB retrace. Its price already bounces in the current resistance and there is a high possibility that it will retrace in these following days.