Friends who short Bitcoin at 57200 can exit at 56500.
Friends who short at 57200 can exit at 56500, which means they have at least 700 points of profit.
In a volatile market like today, if you make a profit of 500-800 points each time you enter the market, you can make a short-term operation. Otherwise, with this kind of volatile trend, you won't make a penny for holding a position for a day.
At night, you can catch the band market, use time reasonably and cooperate with market trends to increase your income more effectively.