Do you know where the profit comes from?
UST is printed when the Terra coin is burned. Therefore, in order to get more UST tokens, you need to burn more Terra coins.
You can buy UST, but then someone else will buy Terra and burn it. Now the most interesting thing: look at how many times the price of the terra coin has increased and what is the annual yield on staking the UST token. It was possible to make a 100% profit, but then it would look like a scam.
Then you should remember the opposite, that when selling UST, we automatically turned on the printing of the Luna coin. As we remember, a similar UST dump led to the issue of 7 trillion Luna coins in one night. Will the USDD collateral be sufficient to prevent a similar situation with TRX from happening again?