Hey, good little rundown of the major so-called stablecoins. I would like to point out that USDC is now wholly-backed and controlled by BlackRock, who bought in earlier this year, and has taken responsibility for full custody of the USDC asset. USDT has also never been audited by a reputable 3rd party accounting firm that they haven't paid for.
In my view, USDC and USDT aren't free to use whenever the holder desires. USDC, because any wallet address can be frozen by BlackRock at any time for any reason they choose, and USDT, because there is no actual guarantee that it's backed 1:1. Yes, Tether did lose a lot of "market value" in a short period of time, but they also have very deep pockets backing them, the question is, what is actually propping up Tether. They have sold a lot of their previously-owned commercial paper debt, so, what's really behind it?
As for DAI, although it is overcollateralized with cryptocurrency (other than Bitcoin) by 150%, it is over 60% backed by USDC, which is controlled by BlackRock. I would hesitate to ever touch it, for the reasons listed above.
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