In a bull market, do not be greedy; focus on a single sector to ride the main upward wave. Do not chase every hot topic; concentrate on leading and catching up with top performers. Picking one coin and holding onto it is enough to ride an entire wave. When choosing coins, buy new ones and avoid old ones. Old coins are mostly sentimental relics now; the market only recognizes new narratives and new expectations. New coins and new tracks are the ones gaining popularity. Respect the cycle—cryptocurrency markets turn over every four years. When delivery drivers and convenience store owners start talking about coins at the end of a bull market, it is a signal to liquidate counterfeit projects; otherwise, a 90% retracement in a bear market could wipe out your entire investment.