According to Cas Abbé, risk management is crucial in crypto trading. He suggests five rules to lower risks: 1) Rotate faster by entering early and exiting before others, 2) Wait for easy mode by avoiding choppy markets, 3) Not explicitly stated, but implied to focus on clear trends, 4) Not explicitly stated, but implied to manage positions wisely, and 5) Not explicitly stated, but implied to stay informed on market narratives and sentiment shifts.