Seems there is a (very large) market for a legit version of Tether. What's stopping some other company from doing what Tether does with more traditional commercial paper / US based short term loans / govt. bonds / etc.?
If you want fiat currency, use fiat currency. If you want a secure location to store and transfer your money, use a bank.
If you want to support a dodgy organization's fake digital money printing scam though, go with Tether.
None of those can be sent to anyone in the world and settled in minutes/hours.
If I had to choose USDC or USDT though, I'd rather hold funds in USDC. In general I'm not much of a fan of stablecoins though, but I do acknowledge the quick, 24/7 transfers they offer is interesting, as well as the high APRs for lending them. However, I'd still rather just hold fiat vs stablecoins. I find other cryptos to be much more compelling.