Tether has invested $1.5 billion in Eight Sleep, an AI-driven sleep technology company, at a $1.5 billion valuation. This strategic move marks Tether's expansion beyond stablecoin issuance into aggressive venture capital investments in tech sectors such as health tech, neurotech, robotics, and AI. The investment follows Eight Sleep's achievement of free cash flow positivity in 2025, a significant milestone for consumer hardware firms. Tether's venture capital strategy is fueled by its substantial profits, which exceeded $13 billion in 2024, primarily from US Treasury yields. The company is actively deploying its $6.3 billion in excess reserves into various tech divisions, aiming to build a diversified technology conglomerate. This investment in Eight Sleep, known for its AI-powered biometric tracking and sleep optimization products, underscores Tether's commitment to advancing human performance infrastructure.