As a ghost trafficker, what's wrong with trafficking female ghosts?

The world has changed dramatically, terror has revived, and weird things have appeared in the world one after another. Jiang Xiaobai traveled through time and awakened the ghost dealer system. As long as you sell ghosts, you can become stronger! [Ding! You successfully sold the female ghost to the mine, ghost sales value +3000] [Ding! You successfully sold the red-clothed ghost to the pyramid scheme organization, ghost sales value +5000] [Ding! You successfully sold the ghost king to the dance hall...] ​​Since then, a legend about ghost dealers has spread in the ghost world... Ghost mother: "Stinky boy, if you don't sleep, be careful that the ghost dealers will come and kidnap you!" Female ghost king: "You... don't come over! If you come over again, I will...