nothing about crypto is decentralized. it's verified by enormous mining farms, who contribute hashes to centralized pools, all stored on one central ledger, and interfaces with the fiat/legit financial system only by using that very financial system.

oh, and three acounts hold like 25% of all btc in circulation.

crypto can do some things, but decentralization isn't one of them. just ask Coinbase

USD tether is barely crypto at all, it's a wrapper around treasury bonds which the US govt. regulates