I know several investors here and also traders has a pattern style for their selling and buying scheme. Well in my case, if i hodl some of my coins, if there's a gap that can give me a profit i immediately sell it since it is not anymore a loss profit for me, I don't wait to waste it such that it couldn't give me a profit in the long run. So, if you buy, buy in the times of dip market and sell whenever you got a good proit from it.
but in reality it is not that easy to buy when the market is down because this problem greatly affects the amount of profit we will get in the future. what often happens is when you buy because you think the price has reached its lowest point but what happens next is that the price continues to move down and reaches a deeper point. This means that before buying you have to do an analysis first because there is no guarantee that after you buy the price will move up.