When I first heard about the Tether worries and Bitfinex I became very worried and removed all my coins as quickly as I could, I think that was the right move but it seems that Bitfinex is going to keep lingering like a bad fart for a while still.
But whether it stays around for a while yet or not, this really seems like it could be a new Mt Gox.
And regardless of what the future of Bitfinex is, USDT is totally crap, and scary and I wouldn't touch that with a ten foot pole.
Well, in case it crashes USDT will affect much more than just Tether. But let´s see how it goes :)