Unofficial Noxious Open Tibia Wiki: info, downloads, tools, calculators...
The casino allows you to bet and play on different games with your Noxious Tokens although there is a great chance that you will lose.
More info here.
Watch out with bot players in Depot! The odds are on their favor and you will always lose.
At only a 90% win on High-Low the game is completely unfair. They also occupy Depot spots making them an inconvenience for everyone so please, don't make them rich!