Stablecoin Total Supply
Some stablecoins, like USDT and USDC, are pegged to more conventional currencies, like the U.S. dollar through cash and assets with equivalent value as opposed to an algorithm and associated reserve token. USDT and USDC also are backed by companies that issue the coins so it is quite centralized. However, UST or Terra-US Dollar is not backed by any value. In order to mint new UST, equivalent amount Luna, is burned. If the demand for UST rises with more people using the currency, more Luna will be burned and some of it will be diverted to a community pool. The community pool will help balancing and stabilize the price, to a degree.