$BTC
I don't know who does this, but what happens is that when the time is right to sell BTC, they raise the price more, and when the time is right to buy, they lower the price more, and in both cases, a sudden price movement occurs. As for currencies, you should not rely on the price movement of BTC because the value of the currency should not be determined by the value of BTC, but rather the movement should be exactly with USDT and supply and demand, because it has become clear and obvious that all currencies follow the movement of BTC.