It depends on individual but I think price drop is an opportunity to accumulate at the bottom, at every new all time, I prefer to sell off and remove my funds and then buy back at the bottom. It has been the tradition of Bitcoin and always work for me.
Some traders and investors prefer doing dollar cost average since they prefer there fund to always be in bitcoin. Whatever works for you, I hope you make profits, you don't hold for years and end up making just some changes.