I can totally relate to your question. I have been in a job I dislike for three years. And for three years I've been telling myself that I'm going to quit. However, my responsibility to provide for my family hinders me from doing that. So I promised myself that I will just wait a bit more until I have enough savings because, let's be real, it's hard to start over.
If you no longer see growth in your current job, and there's nothing that stops you from quitting except for the salary, then quit. Follow your dreams. Follow your heart. Because even if you're earning billions, if you don't find purpose and fulfillment in what you are doing, then you will never ever be complete. You will always have this strong desire for doing the thing you really long for. I think imagining yourself in that very moment will help you in making a choice. Remember the old saying, "Make your passion your profession."