Everyone who conducts crypto trading must already have principles and know about profit or loss. My principle is that I will never sell when I see the results will lose, I better hold when the coins that I have bought are decreasing in price (holding is not afraid of losses) but part of the strategy. And I will sell when I increase, although I will definitely sell a little. Never be afraid to experience a loss, because loss is one of the risks in trading. But you must have a strategy.
It looks like you are doing something wrong with it. if you have been in lost and then you sold them when you got a little increase just like you buy 1000 gets decreased 900 and after a little recovery to the 300 and you sold them and that's the wrong principle in trade and you have missed the pump more than 1000 at the beginning to hold it.
just sell when you are in the profit and you should not care about long term caused by you can get long term coin and never try to speculate short term coin for long term