He's so successful that he even tries to prolong the game by buying properties.
Later in Fortune Street, during Good Egg Galaxy on Easy Rules, Mario is one space away from Slim's very expensive 2106G shop, and Slim is cautiously hopeful that he'll be able to raise its prices even more on his next turn, and that Mario will then roll a 1. However, it's a pretty long shot that both of those things will happen. Guess what? Both of those things happen.