We’ve seen people coming from all over Egypt and Canaan to buy grain from Joseph. What happens when the money runs out? They start trading livestock for grain. What happens when that runs out? By the end of the famine the nation of Egypt will own everything in the country, including the Egyptians.

Genesis 47

Then Joseph came and told Pharaoh “My father and brothers, and their flocks, and herds, and all that they have, have come out of the land of Canaan and they are in the land of Goshen.”