I’ve summed up my experience of playing with contracts using real money and losing along the way, hoping it can help everyone: 1: Can’t hold onto profits, but always hold onto losing positions. In a bull market, you develop the habit of holding losing positions, and a black swan event can wipe you out instantly. 2: Trading against the trend. Always trying to short during an uptrend by finding resistance levels, or going long during a downtrend by finding support levels—this kind of trading leads to brutal liquidations. 3: Not sticking to major coins like $BTC, $ETH, SOL, or BNB. Always thinking the altcoin season is coming, so I go bottom-fishing and longing altcoins, but the result is always losses. These three points are my most fatal mistakes. I hope everyone can learn from them.