It's difficult to defeat the overwhelming feeling of "There is no future (Or at least not a good one), so what's the point?". I feel like even if I live to 100 we're not going to be anywhere close to a Star Trek utopia, but more smack dab in the middle of a Dark Age.
There's always the gratitude of future humans
Some sort of “future suffering and benefit” index being used in decision making should be a thing. Robinson has a version of it in his climate change book.