If you are worried about having your tokens frozen, don't take part in crime and illegal activities. I have never heard of a poor innocent bastard somewhere who got his stablecoins blocked by the issuer for no reason. There might still be such cases, and if anyone knows about them, post a link here. It's usually stolen or hacked money and significant sums. Still, having the power to do it is a worrying thought.
The decentralized stablecoin DAI is one that can't be frozen by it's issuers. So, consider using that if possible.
Yes, but USDC, if you do the maths block on average 10 times less than the tether. I don't know if you have ever used the live support from tether by email. They usually reply in less than 20 minutes during working hours in Singapore about just blocking let's say illicit transactions which may be a liability for their company. They just block with no evidence, no criminal trial, just send them 2-3 blog articles or some txds sometimes with no link between them and they just lock it
USDC is more safer on this ground, perhaps because their team is somewhat ignorant. Most of the crypto hacks on defi right now, swap on tornado to usdc instead of usdt.
Nobody should use nor trust both of them.
There is no backing for tether, at least it used to be in BTC. At a moment they were stating that 100% of all tether was backed by assets (not us bonds) but..: https://ag.ny.gov/press-release/2021/attorney-general-james-ends-virtual-currency-trading-platform-bitfinexs-illegal
so fuck these ponzi scams