1.You can minimize risk by reducing the size of your portfolio.
2. Move to other sectors that just cryptocurrencies.
This is what I must do to minimize risk, from my experience if you want to manage your risk that means you have to manage your capital too.
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.
For me to manage the risk you need lower your invest, but before that know your investment if its have potential to grow. Also when you finf a good investment you dont need to invest all you money even you know there possibility you get huge profit, its better to split your money