Punk has suffered 37 concussions.. but when has he EVER took time off due to concussion? I have NEVER heard him receiving a concussion up until he quit, and I am a huge Punk fan. If he had suffered that many concussions, dont you all think that we would have heard of them BEFORE he quit? Also most of his time off was due to knee injuries, and overall body pain in the back, neck, etc.. never saw a single report about a concussion, despite having 37 of them in his entire career. Also the WWE still pushed as the #2 star, despite the concussions.
The WWE will push whoever they want. The reason they don't push Ziggler is NOT because of the 4 concussions in his entire career. Just look at Orton, he's reportedly suffered 7 concussions and he's always on top. So clearly the WWE don't consider concussion history into who they push or not.
Also there are multiple superstars who have only suffered one concussion and never suffered another. Sheamus suffered one in 2010 after Elimination Chamber PPV, then when was the next time he suffered one? never.. then look at The Miz, he suffered a concussion at WM 27 and never suffered another one. Hell, he even CONTINUED his WM match despite receiving a cnocussion in the middle of it. He even SHOWED UP on the next day at Raw, despite his concussion. If concussions were that big of a deal, would Miz willingly work through it like that? Would the WWE even let him?
Back to the subject, Daniel Bryan will be fine. It's clear that he has a burning desire for wrestling, probably the most passionate person on the roster; he isn't going to let a mere concussion stop him.