Tether Investments has made a $50 million strategic investment in Eight Sleep at a $1.5 billion valuation to advance localized, on-device AI health technology, according to Tether Investments (https://tether.io/news/tether-makes-strategic-investment-in-eight-sleep-at-1-5b-to-accelerate-sustainable-health-intelligence/). The deal focuses on accelerating health intelligence that runs on consumer hardware rather than the cloud.