USDT is considered the biggest stable coin in the crypto market, based on market cap, while some argue they are not transparent at all.
Which one is safer ? USDC is the better one with strong investors / issuers backed. At least, we have some ideas how much USD in their treasury and what kind of assets they are investing
USDT - shorting USDT / USD gives you positive funding with only 4-5 % downside risk, worth to try ! Prefer relatively smaller trade ticket size