You can consider this investment product, 200% annual return in 7 days, limited to 5000 units, which is about 400 USD. If you have multiple accounts, you can do more. Buy 5000 units of spot, then short 5000 units in a corresponding contract. The funding rate can be ignored. Each account earns 15 USD in 7 days, so ten accounts earn 150 USD. Last time it was proven, with a limit of over 1000 USD, but now it's gone. In the future, when new coins are launched, you can look into investment products. It seems like they all offer 200% annual returns. Although the returns are a bit lower, an average interest of over 1 USD per day can easily offset the losses from alpha, which is more comfortable than trading competitions with such a deadlock.