I am the big boss. What is the use of prosperity?

Enter a double apartment. I am a big owner. The function of the prosperity level is to unlock the double apartment, and I can get rich silver coins and customer experience rewards. I am a big owner. This is a very interesting simulated business game. In short, to be an ancient wealthy businessman, there are still plenty of challenges waiting for players to participate, slowly accumulate wealth and become a small boss step by step.