So my question is, what is the final outlook for PUA? When should you look to settle? Can you PUA until you die or will you eventually get over it and be too old to settle?
Like I said somewhere else: pick-up is like a sport. As long as you find it worth spending your time, energy and money on it, there's nothing wrong with keeping doing it. You may look back at 38 and say "all these chicks I banged were meaningless," or you may look back and say "those 25 marathons I ran were awesome."
Some are playboys until they die, some start wanting to build a deeper relationship at some point and spend their efforts on something else. In the end you make your own life choices (like Da said: know what you want), and if you end up not being satisfied with them you know who to blame. Just remember that in the end you can't take any of it with you when you kick the bucket, so you'd better enjoy it now.