Weeding out is indeed a good thing, but the possibility of crypto-wide crash is also to be taken into account, especially if it is discovered that Tether doesn't have the 2 billions and that this non-existent money has been used to manipulate the market as it is now being said.
I would strongly advise you to read this: http://jamescrypto.com/the-difference-between-inflow-and-market-cap-and-how-it-relates-to-tethers/
and this https://www.wired.com/story/why-tethers-collapse-would-be-bad-for-cryptocurrencies/?mbid=social_twitter_onsiteshare
It gives a good overview of why it's not just a sale. No FUD here, but "don't be the one left with the bag". ;-)
RE: Why the Tether Scandal is Great for Crypto Investors