Nowadays i am very confused about that usdt, it become terrible about more than blockchain, i stopped to use it.
If you want to buy btc, you can do it with usd or tether, but I dont understand for what reason people buying usdt and hold it.
Holding USDT is having the same risk as holding your cryptocurrency in an exchange wallet. In case of the second option, your coins are being held by the exchanges and they can get hacked, or the owners may vanish with your coins at anytime. On the other hand, if you hold USDT then you are holding the tokens by yourself. But these tokens can become worthless, as their real value is being held by the individuals who store the backup for Tether tokens.
You dont understand the use of Tether, if you do you wont ascribe such a damaging reference to it. It is not as volatile as any coin which makes it easy to keep the value of any coin while taking profit. There are several wallet that hold tether with your access to their private keys, that can keep it as long as u demand.