Well it looks crazy you know.
He actually lost 2,000 bitcoin, very big amount of money. Let's say the price of bitcoin now is $8,000 x 2,000 btc = $16,000,000. He lost all he had. But whos fault is it?
It is not btc fault or users one. The traders fault it is. For sure.
The first rule is DON'T INVEST MORE THAN YOU ARE AFRAID TO LOOSE. !!!!!!