What happened to goat?
There was this user "goat" on Bitmex. He was very active in the trollbox. He defined himself as an old guy, at least in comparison to the juvenile crowd there. Boasted a lot about his riches and his profits. Gained an awful lot lot, until one day he got very, very, very badly rekt. That was a few months before the drop from ~20k down. Unseen until then (like 18 or so months ago).Could it be him?
Remember Richard Heart? He acted like the goat scenario that you describe... however, Heart was whining like a baby, when BTC went down to $6k the first time, in about early February 2018 - which kind of implied that he had already largely lost his shirt from the post $19,666 price downfall.