As far as being employed is concerned, you will never know when the time comes you may want to test the market and transfer to another company. With a growing market, you are bound to get a better deal if you look in the right direction.
Some people feel that with their current company, they will not look for anything more. But fortune and times change and nothing is definite. While you may be sitting pretty, leave some room for potential changes. A better job offer may be in the works and your resume is all they will need.