Of course, all games are set in favor of the player losing, so many devise special tricks to increase their odds. Simply buying enough tokens to purchase the desired items would be insanely expensive, basically necessitating high performance on the casino floor if one wishes to obtain the best prizes.
The only reward for doing well in these games is more tokens, but after accruing large amounts of them, the player can cash them in for various special items, many of which cannot be obtained anywhere else and are usually among the most powerful in the game. The Casino is a gambling hall, usually underground, where the player can use their gold coins to purchase casino tokens, or coins, which can then be wagered on various games of chance.
