Always look for a better job, always try to learn new things in your current job, never stop re-inventing yourself.

If you are not learning anything in your current job then you are wasting time. Figure out something to learn, it will make your job more interesting (and more fun) and it will help you in the future with knowledge.

Engineering jobs are always plentiful and scarce at the same time, they are plentiful for the people who know and/or have experience in the new hotness, they are scarce for people who have skills for things that people are not using in abundance.