Is it something to be concerned about?
If you are holder of usdt, you can switch to another stablecoin. TUSD or DAI? I have read about these stablecoins proven to be backed to 1:1 USD.Could it possibly bring down Bitcoin if Tether implodes?
Btc has nothing to do with usdt, on the contrary, those who sell it will return to btc and this will definitely pump prices. 