Open USD, the stablecoin backed by a consortium of more than 140 companies—including BlackRock, Coinbase, Mastercard, Stripe and Visa—is going for all. Its proposal is as simple as it is disruptive: to share the yields of the reserves with its partners, rather than having the issuer keep them entirely. The news has shaken the ecosystem of Solana, where USDC de Circle was so far the de facto standard for any movement of institutional capital, pay…