Yeah I dont understand how anybody could be at an 80% loss right now. Even if you bought your only coins at the ATH its only slightly over a 50% loss at the current price.
Well imagine you lost few trades with really high volume. It's not impossible. I thing with Negotiation that's what happened.
Sad for him, hopefully he can recover & it hasnt damaged him financially too much. This is why I buy & HODL, buy & HODL, buy & HODL.
Day trading (short term trading & leverage) is gambling.