Being afraid of losing money and trading do not clearly go together, it is absolutely necessary to detach from failure but also from success, in other words from these emotions.
This is exactly because the market will fluctuate according to the investment needs of investors so the value of each coin will vary quite a lot. When your coin is down, think of it as a bad coin or a simple market fluctuation. When you think so, you will be more confident about the coin you are holding, if the coin is not good you should sell to get back the capital.