Holy blue moon is one of the bigger human adjacent religions although some other races might worship as well, that temple's importance is due to it being something tangibly old pre-cataclysm as a chunk of archived knowledge of past stuff was lost as not every record could be saved.

To be honest I didn't bother detailing possible religions because laziness really and didn't consider it relevant enough to the game's focus to like list all possible existing religions. Anyway, it's safe to assume each species has its own native religion such as the Leppids and their area in Yaskal, and if it's important to your character go make something up and I'll probably approve it. 

Regarding coinage let's just there's a universal currency being circulated around for trading between the various places. Also because of magical technobabble you got the equivalent of like a debit/credit card that you can carry around shove into slots to buy stuff.