To have had Stability and purpose. I mean, I want to find a purpose in life, like not just "Oh, I wish I have a job when I grow up" which is great and all but also "I want to do something - have 2 kids, become PM or something". I want to have lived a life where it was relatively stable, to not have to live with worry that I'll lose whatever I had or have done today in the near future.
So, when I kick the bucket, I'll have something to be proud of, and not just end with a sort of relief that every stress and every hardship I've faced is over. Maybe even have something I'll regret saying goodbye to.