$pippin has increased by a hundred times, my goodness, shorting has become troublesome, so trading contracts is quite dangerous. You must set stop losses; otherwise, if you incur too much loss, you won't want to stop loss, and at that time, it becomes very easy to go bankrupt. Even if you have made a lot previously, one loss can wipe it all out. I will short a little first, set the stop loss properly, because I see a long upper shadow; if I lose, then so be it.