Don't put all your eggs in one basket.
If you put all your eggs in one basket, your emotions will change with the ups and downs of this line.
Be happy when it rises, and be upset when it falls.
It's easy to get emotional when you see the rise, and don't know how to stop winning in time. When you see the rise, your mind becomes more and more excited, and it's easy to climax.
At this time, it's easy for you to miss the best time to sell, or even fall again and again, and regret it.
So the best situation is to spread it out, pick a few better ones on the market for long-term holding, and leave a part for risk operation and leverage. But you must remember that the leverage must be within your tolerance. The premise of making money is to keep your principal, and then the interest.