This rule applies to positions over 1000U, even 100k. If it drops more than 50% in a day, what should we do? Just focus on trading volume. The risk is far greater than the airdrop rewards, and I think it's unnecessary to hold long-term... Don't be fooled by a 30% increase in one day; it could plummet 50% overnight, and you'll probably be asleep, waking up to a disaster...