If you are not doing leverage trading there is no reason to cutloss unless you know where is the bottom and buy at that price so you will have more quantity of that altcoin or bitcoin. Market will always recover from its crash, it is up to us if we have strong hands to hodl and not let our emotion affect by the fuds causing us to panic sell our holdings. Market crash only happens when many many fuds keep spreading together with some whales selling their holdings for profit.
Are you kidding? There is always a reason to cut loss with or without leverage trading. The only time you would never "cut losses" is if you are a super long term hodler like most of us. Then you do not trade,,, do not even really follow the market,,, just wait for a good time to liquidate and include more in your portfolio when you have spare cash.
As a trader you cannot afford to think like you and think crashes will always recover:)