As it turns out, Joseph was found by some Egyptians next door to the land of Canaan and taken to its King Pharaoh, who was impressed with Him and his knowledge and wisdom and decided to place him in charge of his entire kingdom.
As it turns out, later on his brothers were suffering in the land of Canaan and went next door to Egypt seeking food. Pharaoh welcomed Joseph's brothers, but little did they know that their brother Joseph was now the head honcho of that country. They didnt recognize he was the brother they had cast out of the family, although Joseph knew.
As it turns out, Joseph provided the family that had cast him out of their midst with food and sustenance, and they were henceforth not only grateful for him providing them with help, they had to admit not only how wrong they were by casting him off from the family, they also had to acknowledge he was now in charge of their future. It looks like Joseph's dream actually came true.
More importantly, little did Joseph (nor his brothers) know at the time that he was thrown into the pit that God was actually working on a greater plan for all concerned!
The way America is going right now (down the road of nationalistic hate and dishonor), it could very well be that these immigrant castoffs will turn out to be part of its societal and economic salvation down the road.
What was a dream for a few resourceful immigrant youth, a dream of attaining a good education to contribute towards an economic prosperity that could have been shared by the entire nation, could very well turn out to be one of America's worst nightmares.