It either confirms Tether is on fire or Bitcoin is finally geared up for another bullish run.
It is definitely Tether being "on fire", as you put it. Tether's marketcap has continued to fall by steady $50 million increments as they desperately cash out more and more to try to bring it back up to $1. They are at least back up to $0.99 for the first time in two weeks. They've lost a billion dollars from their market cap in under a month. So much for being stable, haha.
At any rate, selling Bitcoin at peak prices for Tether and buying them Bitcoins back at lower rates is a smart and profitable move to take anytime Bitcoin loses steam.
Selling Bitcoin at peak prices for an actually stable stablecoin is a smart move. Any move involving Tether right now is decidedly not smart, unless that move is getting the hell out of Tether.