• There's strong evidence that the late 2017 spike in Bitcoin value was due to manipulation via Tether.
• Bitcoin etc values will decay back to their historical levels prior to pump & dump.
Even if we assume the research was legit, according to it tether was responsible for half of the price increase in late 2017.
If we assume that "late" means November and December, because before that it was a slow and steady rise, we went from 4700 to 20k, so more or less 15k. Half of that would be 7k, so if tether has completely no backing and all of it is fake, it made the price go up by 7,5k. We've already went down by almost the same amount. Even if USDt were to be fake, which it isn't and worst case scenario only a small percentage of its supply is faked, we wouldn't go much lower than we are now.
We don't feels worry in business that's a characteristics accept the fact that sometimes losses and have win or sussess continue or trust.