When to sell ETH
1. If you are a long-term player, ETH is at the beginning of a bull market, so there is no need to consider selling for now, at least until next year.
2. If you are a medium to short-term player, around 4000 is undoubtedly a key position, and there will be significant fluctuations. First, it is an important high point multiple times; secondly, it is normal for it to pull back 20%-40% after doubling from the rise starting at 2100.