I'd say do both. Get the cert, but do cool shit in your spare time.
Not in IT, but I'm convinced ive been hired many times because I do a lot of interesting stuff people find useful, like repair cars (simple maintenance to full on engine rebuilds and some body work), read a lot of books, recording and mixing music, repairing electronics etc. It shows them right off that I'm a problem solver who is agile, which is what they really want.