A rat race is a term used for an endless,
self-defeating or pointless pursuit. It conjures up the image of
the futile efforts of a lab rat trying to escape
while running around a maze or in a wheel. In an analogy to the modern city, many
rats in a single maze expend a lot of effort running around, but
ultimately achieve nothing (meaningful)
either collectively or individually.
The rat race is a term often used to describe work, particularly
excessive work; in general terms, if one works too much, one is
in the rat race. This terminology contains implications
that many people see work as a seemingly endless pursuit with
little reward or purpose. . . .
Source from http://en.wikipedia.org/wiki/english
To read up more kindly google rat race and you'll see it
appearing on the first search result.
It depends on what are your dreams, how much burdens do you
have(wife, kids) If your job doesnt suit you, or too much politics,
try finding a new one.