Here he is getting worked up about it in 2017 and claiming it's on par with Mt. Gox and only has months left: https://news.ycombinator.com/item?id=15745532

I find the older comments really illustrate some of the cognitive dissonance Tether skeptics hold.

Keep doubling down I guess, might get lucky one day.

The problem with predicting Tether's imminent demise is, as the cliché goes, that the market can remain irrational longer than you can remain solvent.

Like most cryptocurrency constructs, Tether is ridiculously shady, but that doesn't mean it's easy to predict when it will go out of business.