What is Longevity-as-a-Service?

My model for the longevity economy: personalized health, anti-aging innovation, AI-driven eldercare, and silver spending on wellness, housing and lifestyle, delivered as subscriptions, not one-off treatments. In the US alone, people aged 50 and over generate $12.5 trillion a year, 43% of GDP, the world's third-largest economy on their own. The sleeper nobody watches: insurers and pension funds quietly rebuilding their models for 100-year lives.