We all know that cryptocurrency price depends on demand and supply. Demand and Supply determine the price. Also every rumors/news may have a big effect on price. So when prices are dropping, do not panic and stay calm. Some will say, "Buy more", "Buy the dip". But before you do that, you must re-evaluate the coin/s you own and determine the reasons why its prices fall. If you think the market just overreacted to something that's why its price falls ,then buying more coins may be a good thing. It is important to realize that it is not advisable to simply buy the dip. You may consider "Buy the correction". Or sometimes , the best thing to do when your coins' price has fallen is to dump your coins and cut your losses.