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 my assets. This experience taught me three iron rules: 1) Always invest with spare money; 2) No single asset should exceed 10% of your portfolio; 3) Stop-loss is more important than take-profit. The key to improving discipline lies in establishing a trading log, setting a cold wallet buffer period, and using 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 worth in real trading; remember that "surviving longer is more important than making quick profits." Just like in the bear market of 2021, strictly adhering to these principles kept my drawdown at 23%, far lower than the industry average of 67%. Remember: the market always has opportunities, but you only have one principal.