Tether fud has make people invest in bitcoin and leave the USDT. This is the reason we see a mini bull run in bitcoin at the moment. There is no stable currency as Tether has been backed by USD by 74% only which is creating panic amount the USDT holders. Once this fud will be over people will convert back to USDT to book profit from BTC.
Indeed it has. Although I'd have to say there is a possibility that these fudders won't convert to USDT if USDT is delisted from every exchange. The more USDT gets delisted, if it does, the more the fud, thus the more bitcoin being exchanged. Hence an increase in bitcoin price.
-Ryo1946