Being a good trader needs a lot of work. It's not something accomplished overnight. Read books, find a reputable mentor, and surround yourself with like-minded individuals to achieve your goals.
To become a good trader, first you need to become a good observer and good learner. Learning from the market and from your past good and bad strategies. Observing the price charts in the market, the margin of profit in various coins and holding a diverse portfolio. Besides, stay patient during the market crash and the decisions of holding and selling are important for a good trader. It takes time to become one.