If you have the experience to hold an ATP, then yes, you should strive to get it. Very few places will hold an ATP against you (there are a few that will...but not places you're likely to apply, anyway).
If you hire on with a regional or other entry level job today, you can often get your ATP during your initial training or checkride. If you are going that route, at least have a current knowledge test report (ATP written) with a high score to show. It shows you're ready, and serious.