Been seeing so many different articles on this. Charts show a strong correlation in supply of tether with rise in BTC prices. Is Tether supply and trading a significant driver of Bitcoin prices in 2019 up from $3k level in Dec 2018? If so, how much really [estimates with precision]? And what happens to Bitcoin prices if there's a Tether crackdown or if some other really bad news about Tether hits the newswires?
I certainly don't see a strong correlation between the two at all - even though it has been argued by many others that there is.
I wouldn't discount the possibility that printing Tether out of thin air is contributing to certain rallies either, though. But that's not the main underlying reason of these bull and bear markets, in my opinion, because that would still be attributed to the natural market cycles that imminently occur.
Think about it - even if Tether's supply increased during the bear market, where sentiment is extremely bearish, would it really have an impact and all of a sudden reverse the long term trends completely? No. The main driver of that is people's expectations given the halving, how prices consolidated at $3k for a significant amount of time, as well as institutional interest.
To answer your other question, I do think that a tether crackdown will detrimentally effect BTC prices in the short run due to trader's reliance on it as a fiat replacement on exchanges. But in the long run, I doubt it'll hinder its growth.