A reason to be wary about USDC are that their haven't been audited, just attested https://www.circle.com/en/usdc , and not even recently at that.

Note that attestations are easy to fake: the article mentions the case of Tether

> Failing to complete an audit and settling on an attestation “for transparency”. The morning of the attestation, tether moved $380m from sister company bitfinex into a bank account to pass the verification