This question is based in the assumption that we have some reasonable idea about how long we are going to live.
That assumption hasn’t worked for me since 1974.
It seems to me that I have some reasonable chance of living for the rest of eternity.
Once we can stop, then reverse the degenerative effects of age on the human body, then we have the biological possibility of living a very long time.
The next issue is the sorts of risk profiles we are willing to accept.
Given the exponential trends in technology, it seems to be a reasonable assumption that we will be able to exponentially decrease the non-biological risks to life from living a very long time, and thus the longer we live, the more likely we are to continue living.
This is a major game changer.
It means that all projects become in lifetime projects.
Greed becomes a thing of the past.
Greed can be seen as a risk mitigation strategy based in very short-term and non-cooperative thinking.
Once we have the ability to reliably identify and mitigate cheats and cheating strategies, cooperation becomes the only sane strategy.
Thus we all end up cooperating to ensure the life and liberty of every individual.
It is a very different sort of way of thinking from any existing cultural paradigm.