TerraUSD (UST) is the decentralized and algorithmic stablecoin of the Terra blockchain. It is a scalable, yield-bearing coin that is value-pegged to the US Dollar. TerraUSD was created to deliver value to the Terra community and offer a scalable solution for DeFi amid severe scalability problems faced by other stablecoin leaders like Dai. Thus, TerraUSD promises users a higher level of scalability, interest rate accuracy, and interchain usage.TerraUSD provides several benefits that have made it a stand-out stablecoin competitor. Due to its minting mechanism, UST meets the requirements of DeFi protocols that it uses without losing scalability. UST can also be easily added to crypto wallets by simply integrating TerraUSD as a payment method. Another area where TerraUSD has shown its power is DApps. For example, platforms that mint fungible synthetic assets and track real-life asset prices use UST as a pricing benchmark.TerraUSD (UST) was launched in September 2020 (in collaboration with Bittrex Global) and has since gained the reputation as the most scalable stablecoin. UST can be used in conjunction with LUNA, Terra's non-stablecoin crypto, or as a standalone token.### The UST LUNA RelationshipAfter the UST depeg, Do Kwon proposed a revival plan that would split the Terra blockchain into a new chain called Terra (also sometimes called Terra 2.0). The old Terra chain would continue to exist as Terra Classic. This revival plan passed a community vote, and most of the DeFi DApps subsequently migrated to the new Terra 2.0 chain.UST is now called TerraClassicUSD (USTC) and only trades on the old Terra Classic blockchain. According to Do Kwon, there will be no migration of USTC to Terra 2.0 and also no updated version of the algorithmic stablecoin. Thus, TerraClassicUSD is de facto a defunct stablecoin and is not expected to regain its dollar peg in the future.