In the cryptocurrency circle, I have three rules for not opening contracts:

1. I don't open when the market is up. Because what takes a month to rise can fall in minutes, and as soon as I go long, all the bad news comes.

2. I don't open when the market is down. Because shorting can at most double my money, which isn't much, and as soon as I go short, all the good news comes.

3. I don't open during sideways markets. Because the market opinion is not unified, and once I open a position, I get trapped and keep hitting stop-losses back and forth.