Risk is the part of the things in life,they also say it is risky never to take a risk,and before one starts trading,he is suppose to know that trading involves risk,and he should be ready and prepared to take the risk for his future.
Quitters never win.
When you have been trading for some time it's really hard to quit. For a time being, I guess a crypto investor could postpone a bit especially if his trading style depends on the trend. If there is no real trend to see, quit for a while is an option to prevent loss. Some traders do this all the time and just watch the market as charts execute the lower lows.