Teach everyone how to distinguish between good coins and bad coins?
It's very simple, when Bitcoin crashes, you can see the extent of the pullback of other coins to know. No matter how much it has risen before, if the pullback is large, it indicates that it cannot be held for the long term. You must choose valuable coins that have strong backing or ecological support!
Rises little, pulls back a lot, garbage
Rises a lot, pulls back a lot, cutting leeks
Rises little, pulls back little, inferior
Rises a lot, pulls back little, high quality
See which type your coins belong to?