I’d say to handle your emotions in the crypto space, it’s a must to educate yourself, set goals and diversify your portfolio (to minimize risk). Emotional detachment also comes into play (stay informed but not consumed). Focusing on long term can also helps. If this principles are combined, I’m pretty sure one would be able to manage their emotions and make knowledgeable investment decisions.
If someone invests knowingly, then there is no point in controlling their emotions because they have invested knowingly, knowingly, that it is risky. However, if someone is sufficiently educated and understands the causes of loss and its importance in the future, then he will definitely be able to master all the powers of emotion control.