Because you have the spot, you think the market price is going to fall, so use the income from short selling futures to make up for the loss caused by the spot price drop.

Of course, if you have a lot of cash, you can also deliver the goods on time. The spot is delivered at the price when you are short, so don't worry about the price drop in the future. This is a hedge.

Bulls are buying up, bears are bearish and buying down, and futures trading is the future price.