If a lot of people are buying USDT with BTC, it means they don't have confidence in BTC going further up and want out in order to wait for the price drop, so th

If a lot of people are buying USDT with BTC, it means they don't have confidence in BTC going further up and want out in order to wait for the price drop, so that they can buy in later , assuming the price will drop as expected by them. If they had a way to short BTC/USD, they would simply do that instead.