I want to live a long time. But that doesn’t mean I’ll pay any cost to add any amount of time to my life. Like all things, the marginal benefit must exceed the marginal cost.
Consider that not all years of your life will be equal. How much worse are you willing to make your 30s and 40s to add one year to your 90s? One month? One week?
There are many variables – too many. Some people like salt more than they’d like a few extra weeks as an octogenarian. That’s a reasonable trade-off.
Everything has a cost, and the time between paying that cost and getting the benefit can be decades, if you get it at all. Buyer beware.
The Opportunity Machine 