Some great ideas here

But the market is treating them worse than " Satoshi Vision ' https://xx.network/archive/praxxis-emerges-from-stealth/ " . . . Using Elixxir, financial transactions denominated in Praxxis coins can be executed efficiently without leaking metadata. Alternatively, Praxxis can provide identified check-like wallet transactions. The full technical details of the Praxxis approach will be included in a forthcoming whitepaper currently being prepared for release later this year. . . . " That was 2019 btw.