Try to create a plan each time you enter the market, and stick to it. It helps to keep calm. If necessary, apply for some trading tools to feel more comfortable and confident. For example, I have recently explored for myself info bot launched by the exchange I use - https://t.me/CexIoInfoBot. I like the idea of monitoring the changes that occur in the crypto market and price movements. Also, I noticed I feel calmer now because if something new will happen in the market, I will be informed.