Bitcoin is just a hold. After each correction (which is now happening), bitcoin is restored fairly quickly in price and becomes even more expensive. So do not sell bitcoin. If you need money, then sell part of the bitcoin for the amount you need. The remaining bitcoins hold.
I guess holding is really hard to do. But its' the best method to really get financial profit. I think 6 months hold is fairly enough and see how it goes for anyone. If you think you need to sell and get profits then I guess its ok. But for those who can really hold for many years, specially early adopters, they are going to rich. So its really up to us, what direction we want to take with our bitcoin holdings.
If you don't need cash for emergency cases, the better decision is holding BTC until the price go up again. It will take some time but in general Bitcoin's price is increasing year after year and it is expected to become a lot more valuable in the near future, so keep collecting BTC and holding them.
I also keep that in mind. Hold and just dump if I needed money for emergency purposes only. So far I don't need to sell my coins but accumulated more during this dip.