The most important rule in trading is to "buy low sell high". Unfortunately, that's usually harder to execute than it sounds because of panic and greed.
The best of trading is Buy Low and Sell High, in that way you can earn more, but you should be in the right timing on trading you do not need to be hurry on selling, try to wait until the price value of your coin is high enough to sell.
All you need is buy low sell high and timing for trading.
the main thing is emotion and panic, is it in the ground and it takes years to understand that panic can be the other way around to buy rather than sell