SXC, the full name of Stable XT Cash, is a digital currency based on the Ethereum ERC20 smart contract and an independent digital currency issued by the XT Foundation. The SXC Foundation makes part of it into circulation in the form of digital currency mortgage. The circulating SXC is mortgaged according to 100% of its value. The collateral can be one of BTC, ETH, LTC, QTUM, etc. All users can participate in the mortgage and public display. The network fee income generated in circulation is evenly distributed according to the collateral, and the mortgage is uniformly controlled by the foundation.