We used to have DAI, which was fully decentralized and over-collatoralized by Ethereum tokens (the native currency of the platform DAI is rooted on) - but the founder mysteriously died as the DAO was taken over and made to begin collateralizing DAI against USDC and USDT, ironically.
It is a shame how far crypto has fallen culturally that this stablecoin business is some niche story. Most people are in it for the money, but many good people are not.