My portfolio lost 10%.
I got real sick went into the hospital for 3 weeks where I didnt have access to trading. Stupidly I didnt put stop limits, but I did lock in some profits.
Losing 10% of you portfolio during being your hospital admitted as patient time period 3 weeks? Market does not doing well recently after btc coming back to bellow 40k. So in this unstable market situation 10% of sudden dump is really very normal to me.
But yeah if you don't want to see such loses then better to use always stop loss feature.