It is most times seen that whenever there is a drop in price of bitcoin, there is likewise. a drop in price of Alts as well. Which Alt is not usually affected?
USDT and TUSD will never affected in any situation because both are centralised platform so it will always maintain a 1USD. If you have any dought my word just check it in Coinmarketcap so centralised platform are stable in this situation but not all the centralised platform. These two coins are not rely on supply and demand so it will not move to downward.