Tether is completely traceable. Transactions are made to be visible at all times to all parties involved, and to the users from outside. Of course, there are workarounds, such as "shielding" coins using apps. However, transparency is a fundamental quality of Tether due to the fact it under control of a private company that requires your personal details.
As for the disadvantages of cryptocurrency, Tether is controlled by a private company. The purchase of tokens allows this private company to obtain information about you because it needs to transfer money to your bank account. Before you even provide this data, you must go through the entire process that requires stating your address of correspondence and source of income. Hence, the answer is the currency USDT is not anonymous.
Although Tether is closed source and pseudo-anonymous, you can also buy and sell Tether (USDT) anonymously using the following measures;