I can confidently buy Schwab, Capital One, Vanguard, or other funds in the USA (without any research) because the US Government regulates the words "Money Market". Anyone claiming to be "Money Market" follows strict regulations and guidelines.
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This is NOT true for stablecoins. Stablecoins attempt to recreate the same thing but without openness, without regulations, and without audits.
They work because people "want" them. Everyone wants a bank, especially one tied to the US Dollar. Unfortunately, the easiest way to get one is to simply lie about your connections.
Do we truly know that Tether is tied to the US Dollar? No. We don't. There's been no audits. The yields generated from such loans are innately at risk. I recognize that people in other countries want that kind of trust, but you can't just fake trust. You have to rebuild it up from the ground up.
In those other countries, other entities must build that trust for themselves. Tether obviously wants to be such an entity, but I have my doubts to their legitimacy and safety.
[0] https://www.bankmillennium.pl/en/individuals/current-account...