As someone who has been through it, my biggest lesson is that during the peak of the bull market in 2018, I FOMOed into buying EOS with all my funds, and as a result, my assets shrank by 90%. This experience taught me three iron rules: 1) Always invest with spare money; 2) Do not exceed 10% in a single asset position; 3) Stop-loss is more important than take-profit. The key to enhancing discipline lies in establishing a trading log, setting a cold wallet buffer period, and using volatility alerts. My 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, 'Living long is more important than making money quickly.' Just like in the bear market of 2021, strictly adhering to these principles allowed me to control my drawdown to 23%, far below the industry average of 67%. Remember: the market always has opportunities, but you only have one principal.