@N1C39UY You may like to see the ARC Reserve Currency - www.arccy.org - a stablecoin.

As for use-cases; beyond solving the challenge of crypto-fiat translation (for people reverting to fiat for stability); it can:

(1) act as a safe-haven currency for any user that has concerns about their existing wealth (e.g. in a high inflation fiat context; or in a high speculation crypto context).
(2) facilitate better liquidity on exchanges
(3) provide a benchmark series data for measuring the performance of other cryptocurrencies and alt coins (as well as pricing goods and services)