From the technical point of view, USDT/USD has broken the 0.99 support and is trading between 0.95-0.99. The price has been rejected by 0.99 TWICE. I believe that somebody is distributing USDT to the retailed traders at this price zone. After the distribution, USDT/USD will fall. Which means, something may gonna happen, it may be a bad news. If USDT/USD fall, the profit of short position of BTCUSDT will not be as much as that of BTCUSD because of the depreciation of USDT. In the worst case, there might be a short squeeze of BTCUSDT pair even if BTCUSD is falling.