After my 2 years in the cryptocurrency space, after all the panics at the beginning(first few months) of my investment journey, you simply kinda just get used to it. A huge factor is also that even though I invested a significant amount, if ever my crypto investments go to zero(even if it's kinda almost impossible), I would still have a place to live in and have enough money for food and to start over.
A bull market right now would be really nice, though..
Once you have experienced the sharp fall of the market in the crypto world, you get immune to it the next time it happens as you know somewhere in your heart that what has fallen will soon recover and rise again. You know that the bearish trend will soon get over and coins shall see bullish trend. So the fear goes away with experience and you get bold on the decision that not to sell in loss and always HODL when the market falls.