Personally i think the person who did this, as it seems to be only one buy order, purely did it to get some attention to the coin. He bought the whole orderbook at once. Its most likely be bought his own coins as there wherent much sell orders at those levels.. so im fairly sure not many people have made a profit with the last rally, at least not much btc wise
Unless people already placed their sell orders in anticipation of this happening with their inside information and what have you, which wouldn't be the first time due to how the all the devs suck up to this guy