Buy and hold is very different from day-trading. Day-trading transactions take place only within the day. Buy and hold strategy is for long-term traders. The best strategy in crypto trading is to gain more knowledge about trading and practice it. It will take a long period of time before you master it. But it is worth it. In the process of learning, you have to learn also to control your emotions - greed and fear. The two key for me is to read about day-trading and apply it and control your emotions.