Anything else has failed miserably because the network can't handle the traffic. Of course they're promising a scaling fix Real Soon Now (see above for "plausible deniability R&D mode").
https://www.circle.com/en/usdc
https://etherscan.io/token/0xa0b86991c6218b36c1d19d4a2e9eb0c...
Wiring is free and instantaneous for anyone sending moderate sums. Fidelity, for example, does this.
What counts as a "moderate sum"? Last time I tried to wire money, every option I could find charged a $XX fee no matter how much I sent.
I’m not sure if you understand how the boring old SWIFT-addressed wire competes here. I haven’t sent 10 million, but hundreds of thousands anyway. It costs no more than $25, is settled within hours, and has all sorts of safeguards that don’t exist in crypto. The funds are immediately available for use rather than USDC which AFAIK isn’t accepted for payment on anything, anywhere.