Imagine suddenly you no longer exist, poof, from one day to the next there is no more you.
What if you knew that this day would come in a month?
What if it wasn’t for another year?
Or in 5 years?
Would you spend your remaining time differently than you do now?
If so, why aren’t you already doing it?
What you did either way wouldn’t matter to you but it would affect others in the prior. But would you care?