I have another view. I prefer a solution for not having panic rather than one for overcoming it.
1) Do a lot of research about the asset you are going to buy before you buy it and decide to buy it for its fundamentals and long-term perspectives.
2) Only invest money you can afford to lose.
3) Diversify.
4) Dont have more than 25% of your portfolio in high-risk assets like bitcoin.
Those are basically my points. With those I yawn in markets like the current ones.
#3 and #4. My rule of thumb, whether in crypto or stocks, is that i maintain 10-20% per position of my total portfolio.