The vaults of DEX are basically like this, with some platform players going long and others going short, making it impossible to achieve a complete balance of positions. If someone makes money on the side with a larger position, the pool will lose money and may hedge against CEX. This is okay, but there is a risk of CEX suddenly going bankrupt and closing down. Basically, a contract player is likely to lose money, so there will be people who deposit USDT into the vault to earn interest. Occasionally, in such special situations, those who deposit USDT for financial management will lose money.