Thing is everyone can do what Tudadar does. save up some pp, join next world, spend that pp to upgrade villages, mines, and noble few barbs (spread across continents) and scavenge and sell back to market. Basically more pp you have, easier it becomes, each world will become easier to earn pp, but that is boring.
I personally don't see then point in having millions of pp if all you will ever do with it is use it to noble/build barbs. At some point you gotta play for real and spend that pp before game dies out lol.