Opinion: Healthcare entrepreneurs—What's your 50+ strategy?

Imagine you're an entrepreneur with access to a vast, largely untapped market worth billions of dollars that will continue to expand for years to come. This market is at your doorstep. It is Americans aged 50 and older, and it represents more than 100 million people responsible for $7 trillion in economic activity each year. If this market were a country, its gross national product would be exceeded only by the United States ($16.2 trillion) and China ($9.1 trillion), according to a study from market research firm Parks Associates. If it is not already, this "Longevity Economy," defined as the market involving Americans 50 and older, should be a priority for every entrepreneur, venture capitalist, and innovator in Silicon Valley and across the nation.