Casino and gambling
The casino can print money, but the reliable method leans on an exploit, so treat it as a shortcut rather than a skill.
Blackjack
The community’s game of choice is blackjack, which players find pays out more reliably than the horse races. Basic play: hit when your hand is under 16, stand on 16 or higher, and bet as high as you can each hand.
The reload method
The community’s money trick: if you lose a hand, do not tap continue. Fully close the app and reopen it, and your money is restored to before the bet. Reload reliability changes between game versions, so it is not guaranteed. Over-betting can also trigger a gambling addiction or land you in jail over casino debt.
Stocks work the same way
The stock market has a similar save-scum: note the prices, age up to see which rose, then reload and buy the winners. Like the casino trick, it depends on app-close behavior and is not an official mechanic.
The Casino is a premium expansion; see Monetization and the Casino Owner data page.