"Well, the mortal world is... sparkly," he says, smiling. "...Also, we have some difficulty transporting mortals between these various locations, and depending on how exactly your gates work, if you could create or teach someone to create a stable network of instantaneous interstellar transportation I don't think it's possible to overstate how rich you could get. Sending you home with the entire collected works of humanity, or at least as much of it as I can reach from my living room, would be cheap. What you could get for a gate network... I struggle to even describe it. You could buy your own planet. You could pay hundreds of people exorbitant salaries to comb the galaxy looking for the nicest previously unclaimed planet available and then declare it yours and settle down there with your library of all human knowledge."