It will come as no surprise to you that my bloodstream is currently hovering around 65% caffeine. This is a sizable achievement in its own right, but I do believe we can do better.
Levitation, by way of example, unlocks around 80%, and I sure would like to give my tootsies a rest. Not to mention being able to cross rivers with a dry pant leg. The possibilities for positive impact are truly staggering.