Are you mostly in alts? Because if you are, then your pain and suffering might have only begun. Bitcoin came back from every major crash happened before but alts don't share the same luck.
If the portfolio is filled with altcoins it will hurt when the market drops lower, but if you own most of the top bitcoins and altcoins then there is no need to worry too much, because once the market recovers the losses will likely recover. So the fact of recovery is guaranteed for Bitcoin because without an increase from Bitcoin there is no hope of a recovery at its previous price.
Doesn't matter if we hold top coins or not,yet we are always pertaining about USD value which we do sees most of the time or being mindful or watchful with it because whenever we do see some declined then we do really start up to worry.
As long you don't sell then you won't lose something that's why self control and emotion handling will really be that crucial because if you don't then you would really able to experience losses which is something that very common to happen due to bad acts.