As someone who has been through it, my biggest lesson was FOMOing into EOS with all my funds at the peak of the bull market in 2018, resulting in a 90% loss of assets. This experience taught me three iron rules: 1) Always invest with spare money; 2) Do not hold more than 10% in a single asset; 3) Stop-loss is more important than take-profit. The key to improving discipline is to establish a trading log, set a cold wallet buffer period, and use volatility alerts. The ultimate advice for beginners is: practice with a demo account for 3 months, and do not invest more than 1% of your net assets in real trading. Remember, "surviving longer is more important than making quick profits." Just like in the bear market of 2021, strictly adhering to these principles allowed me to limit my drawdown to 23%, far below the industry average of 67%. Remember: the market always has opportunities, but you only have one principal.