No man sorry but, the only true decentralized stable coin I know of is DAI. All other stable coins (that I know off) can freeze your tokens if they feel like you are doing something wrong but not in DAI. I doubt USDT can ever truly become decentralized.
DAI is really one of all the stablecoins on the market that is decentralized. And I do not understand why exchanges do not promote DAI in terms of creating trading pairs for this token. This is the reason for the low liquidity and total volume of transactions of this token in relation to USDT
I think that is because DAI is pegged to USD via mediator for which ETH acts.Thereby the mechanic behind its price stabilization is a lot harder than it's sounds for USDT. IMO, if only DAI was backed up directly by dollar fund hold some where on bank accounts then exchanges would implement it more readily.