The world's economy, at least for now, seems to continue to fuel an English language market- especially in Asia and the Middle East. Much of the world continues to conduct business in English, and much of the world's popular culture is disseminated in English.
You can still reap huge monetary rewards from becoming TEFL certified through an accredited program (I recommend checking out this one:
http://www.internationalteflacademy.com ... locations/ and
http://www.internationalteflacademy.com ... EFL-Class/) not to mention the cultural benefits of an overseas experience.