What's this? it's a new coin to me. The CMC doesn't tell much about it.

https://coinmarketcap.com/currencies/sai/ or it's this https://coinmarketcap.com/currencies/single-collateral-dai/ probably it's this second link?

USDT is already a stable coin, why you have to convert it to another stable coin? it turns out that gate.io and codex have the pair you're looking for.

https://coinmarketcap.com/currencies/single-collateral-dai/markets/