The majority of fantasy video games use gold as the main currency, in order to keep things as simple as possible when trading items. A couple of video game franchises have their own unique currencies, like Gil in the Final Fantasy series, but these function in the same manner as gold coins in other titles. Rupees are the currency in The Legend of Zelda and they're accepted everywhere from Hyrule to Lorule. It's also the name of the real-world currency used in India, which raises the question of whether this was an intentional reference?
For instance, purchasing a bundle of 660 coins on the TikTok app currently costs $9.99, whereas purchasing a custom bundle of 660 coins on the website will only cost $7. The value on the website comes to a little over $0.01 per coin. On the app, the value of a single coin is roughly one and a half cents, but seems to vary a little with each bundle.