I've wondered what the relationship between long term interest rates and the human lifespan is. Even if you lived only, say, a thousand years, just putting a l

I've wondered what the relationship between long term interest rates and the human lifespan is. Even if you lived only, say, a thousand years, just putting a little money into some reasonably safe investment would result in enormous wealth over time. Surely if everyone did this, the amount of wealth would tend to drive down rates.