In a fast changing world, unless you have a clear goal, staying static and not participating in the economy for 4 years is probably an increasingly bad bet.
If you are after a lucrative career, certain trades are pretty future proof because they are un automate-able and un-outsource-able Mike Rowe makes an excellent case for this:
http://www.salary.com/11-high-paying-blue-collar-jobs-with-mike-rowe/
Also it is a big misconception that these are "dumb" jobs, a lot of cognitive horse power is required to maintain and set up some of these systems. Case in point is aviation maintenance..., huge crunch coming. Of course that is not a cushy job and night work is a killer...