Two Prime's Alexander Blume argues that Bitcoin L2 yields are structurally unsustainable, describing them as "VC-funded subsidies" rather than genuine returns. As more capital flows into these yield programs, payouts diminish proportionally, creating a shrinking return environment for participants. Blume further warns that each new Bitcoin L2 chain introduces additional hack risk, stating he avoids any protocol that expands the attack surface without sufficient security track record. The commentary highlights growing skepticism among institutional investors about the long-term viability of emerging Bitcoin Layer 2 ecosystems.