While the world is looking for the gamer who was the first to reach E-rank, Chris showed no fluctuation in his emotions. He long knew that he wouldn't be the first to reach E-rank and someone else would reach the rank way before. He could have if he wanted but what he wanted was a strong foundation which is required for a stronger future.
He just completed his ten runs inside the attribute dungeon. Until he reaches E-rank, using this dungeon would be a waste of time for him. He wouldn't gain anything before he ranks up.
Now that part is done, he has to increase his other attributes too. His INT and WIS are way higher than many high rankers but his other attributes are way lower.
Though people usually increase their attributes according to their profession, there are a few who try to increase every attribute. This was done so that there wouldn't be any weaknesses that their enemies could exploit.