Why do you panic? Why?
IF YOU DO NOT SELL, YOU DO NOT LOSE ANYTHING! YOU LOSE THE MOMENT YOU SELL, after you purchased high and buy low. It does not matter what is the price ATM, the only thing which matters is what is the price when you decide to sell. So, to shield yourself from losing money, DONT sell under the price you bought it.
If you trust in crypto and believe it ll bounce back, WHAT THE FUCK IS THE PROBLEM AND WHY PANIC?
If you do not trust in crypto and you have doubts whether it ll bounce back, well, in that case you are in the wrong industry and you shouldn't have invested in crypto in the first place.
So knowing this, what is the problem again?
It is easy to say this but very hard to follow practically. Suppose someone invested $20000 in Bitcoins and the value reduced to $15000 in a month. Now he will not be able to sleep even thinking that it may go to $10000 in some time.