That person was really brave to use 25x leverage... maybe he hoped that with a long position the price would go up, but instead it went down, resulting in rapid liquidation.
What I am surprised with are people trading with millions of dollars and still using leverage. If I am such people, I will not use leverage at all.
If I were trading millions of dollars, I would choose spot over futures.
But for some reason, many people like to use high amounts of leverage... are they that greedy?