Tether is one of the largest holders of US Treasury bonds, currently ranking as the 22nd largest holder, surpassing countries like Australia, Spain, and Mexico.
Tether has also been increasing its Bitcoin holdings as collateral for its stablecoin, USDT, which operates on the Ethereum blockchain as a smart contract.Proof of Work has unique characteristics, and Bitcoin, especially, has the largest network among PoW infrastructures. It is neutral and global, and its scarcity ensures value in transferring data through cyberspace. Despite its opcode limitations preventing Turing complete scripts, Bitcoin is an ideal asset linked to physical energy, serving as a reserve and collateral.
Collateralizing currency with a hard asset is both inevitable and cyclical.
Bitcoin, being a digital native asset, is the best candidate for this role.
The USD is already collateralized by Bitcoin.