Consider education as a long term investment in yourself, a skill and personality upgrade that is relevant for the rest of your life. While the technical skills you acquire might have a short half life and job opportunities are unpredictable, you will not lose the capability to think, organize problems, and react to situations better then your competitors who did not go to graduate school.
My feeling is that while financial markets and employment prospects are always changing, sometimes for the better and right now for the worse, the top 10% of the people will still make it. Updating your education and working as hard as possible is the minimum you should be doing to even have a chance to be in the top 10%!