Chasing the Impossible Dream

Pip chases this dream of being a gentleman and winning over a girl above his station. I see the romance but ultimately he doesn't find either love or happiness.

So is the lesson that chasing the impossible dream is foolish?
Or is it a noble goal even when it fails miserably?

And I guess in the end he's not miserable, he's still hopeful. It's unclear whether he or Estella will actually drift off into the sunset together, as he hopes, or that he will go back to confirmed bachelorhood possibly spending his middle age driving a flashy car, wearing gold chains, and having many but ultimately unsatisfying sexual encounters before dying alone in a big mansion speaking the nickname William Randolph Hearst gave his true love's naughty bits.