You never know - if Bitcoin falls an additionally from here and he buys them back cheaper, he's going to look like he has smart hands.
Don't assume you know the future.
I don't know the future, but I do know the past (obviously, he sold at the very least into a local bottom), and we can infer that this person had no experience in trading given that he decided to sell everything at one single exchange (Bitstamp had a large price differential to the other exchanges) and the way he did it.