The trend for Bitcoin is that more growth would be coming but there will be small corrections along the way...not really as in falling but some little retreat in value and you can take advantage of those if you are planning to buy Bitcoin. In case you want to sell then make sure that it reached a better height before letting go.
Unfortunately, ordinary guys like us can find it hard to predict when will the dip happen. Remember that Bitcoin is one of the most unpredictable animals there is in the whole investment world. All you have to do is to continually watch and maybe even try to know how to read charts and listen/read many analysis.
Then would you suggest to just not sell and hold for long term profits? Is there gonna be some sort of plateau on the price in the near future?