What if every blockchain had its own dollar — not borrowed from Tether or Circle, but minted natively and backed by the same U.S. Treasuries that BlackRock manages for Wall Street? On March 9, 2026, Sonic Labs made that vision concrete by launching USSD, the US Sonic Dollar, a network-native stablecoin backed 1:1 by tokenized Treasury products from BlackRock, WisdomTree, and Superstate. Five days earlier, Sui did nearly the same thing with USDsui.

This isn't coincidence. It's a structural shift. Layer-1 blockchains are no longer content to let USDC and USDT serve as their monetary base. They're vertically integrating stablecoins into their protocol economics, capturing yield that previously leaked to external issuers, and rewriting the playbook for on-chain liquidity.