"But boys who create it out of thin air certainly can, since they are the ones creating it out of nothing."
In the crypto world, this is called a rug pull. Unless someone has evidence that these "boys" are doing this, with proofs on the blockchain transactions (USDT is a crypto stable coin), this can only be treated as heresay.
And of course, if someone cares to provide evidence this is true. For me, now, I doubt this is true. Reason, for one, the total market cap of all cryptos together is only about TSLA + AMZN (slightly less than 3T). If USDT is creating money out of thin air, they should make the crypto market cap over 10T, 100T, why this is not happening?
(1) they are not doing this.
(2) they are doing this in a very very controlled manner and speed, a speed so under control that so many years has past, in the crypto world, a world of so much hype, they just barely flipped MSFT and AAPL.
Either case above, I am comfortable putting my money in cryto and my dry powder in USDT/C/DAI etc.