Actually it depends on the level of your bitcoin holding and how long you have Able to accumulate. If your a long term holder with a plan of about 5 to 10 years and Maybe you are still in your 4th year, you may find it hard to sell it off totally because you haven't met your target yet. But that doesn't mean a holder can not sell a little. Yes you can shave your profit if worse case should happen. But not advisable for beginners who had bearly started  accumulating bitcoin about 6months or 1 year to sell off.