$TREE For the TREE reward of 10 coins, I bought over 300+ U in spot for the first time, and when I tried to sell for the first time, I couldn't sell it. It prompted something about flash exchange. By the time I tried to sell it again, I had already lost over 50+ U, and I am currently down nearly 400 U. I've cut my losses, damn it, I won't participate in such activities in the future.