John Hancock, one of the largest North American life insurers, will sell only policies to people who agree to track fitness and health data through wearable devices and smartphones https://www.reuters.com/article/us-manulife-financi-john-hancock-lifeins/strap-on-the-fitbit-john-hancock-to-sell-only-interactive-life-insurance-idUSKCN1LZ1WL