I'm hearing a lot about COBOL being in demand at the moment but really it'll depend on what sort of tech shops near you are hiring, have you looked at local job postings?
Something legacy like COBOL sounds like the worst recommendation to me. In my experience, not only do you need to be proficient (and have experience) with the legacy technology but understand new ones as well since you often need to integrate with the new or rewrite parts of the old.