The only competition is with yourself. I enjoy reading your comments, space_monk, and the threads you start generally attract quality answers that I learn from. So find some way to keep at it, please, including throttling back if you find yourself burning out. You can bump along for a while just reading content until you cast your quota of votes (I mainly do that) and still you are contributing to the site.
Maybe you should try to do something like write a tutorial? That could perhaps add a few fringes to your prayer rug that much faster.
I'm going to differ with choroba to a small extent: The XP system is indeed artifice, but it is intended to be fun and hence an inducement. When an inducement wanes, it will affect your participation. As a friar upon the path to enlightenment, perhaps you can reinvigorate yourself with something like meditative koans. Once you realize that desire for XPs is foolish, then hasten to catch up with your fellow fools. :-)