There is a way to make money without losing money, cross-exchange arbitrage + contract hedging, put 1wU on one exchange and 1wU of BTC on the other exchange, buy BTC with full position immediately when the A exchange is cheap, sell it with full position immediately on the B exchange, wait for the B exchange to be cheap, and then trade back and forth, and open a 1wU short contract to hedge the risk of BTC falling, observe the number of U or BTC that can be earned by reselling every day, and add funds to the hedging contract. The basic rate in the bull market is positive, and the long-term hedging of the contract also has the capital rate income

Advantages: No need to transfer across exchanges, no need to worry about the risk of BTC falling,

Disadvantages: Low capital utilization rate

For long-term operations, you can consider replacing it with option hedging, which has a lower capital occupancy rate and lower handling fees