Blockchain-based stablecoins seem like a really convoluted and environmentally wasteful way to implement centralized, cryptographically secure USD based account transfers. Why not just use Chaumian ecash [0] - which is perfectly suitable for this purpose and doesn't require mining? [0] - http://sceweb.sce.uhcl.edu/yang/teaching/csci5234WebSecurity...
https://medium.com/poa-network/poa-network-partners-with-mak...