1.You can minimize risk by reducing the size of your portfolio.
2. Move to other sectors that just cryptocurrencies.
Diversification of investment is an easy and common thing to do for management so that it produces less risk. There is more about the place of investment with a small risk level and some other calculations that involve your finances. You also have to maintain the stability of your portfolio every day, because if you speak at the level of crypto volatility then it must be done.
I speak outside of a person's lack of psychology because everyone has different conditions so in my opinion only you can seek from solutions related to how to manage risk.