Good advice no matter where you work, focus on your current job instead of what might happen down the road. Any job can be hit with unexpected layoffs or complete closings with no notice.
If you are happy with the job you have keep it for now but periodically review your decision to make sure you are still happy with it.
If you aren't happy with your current position start looking for a better opportunity. Life is too short and we all spend too time of it at work to not be happy.
If you aren't sure if you are happy or not I would suggest you keep one eye on the job posting sites to see if anything sparks your interest. Just remember the grass isn't always greener in new pastures.