Nonsense. Stablecoins need to be adopted by a sufficient number of people, and first of all, they must be redeemable for scarce assets that can sustain inflation. Scarce assets can be collateralized to obtain USD, and USD can be exchanged for stablecoins to resolve U.S. debt. You should research the legislation yourself; stablecoins themselves cannot be used as collateral, but rather, you need USD or U.S. debt for savings in order to issue stablecoins. Relying on the yield of U.S. debt will not yield high returns or allow for unlimited leverage.