I've had to change careers several times. Sometimes because my interests changed. Sometimes because all bridges have been burned beyond recognition, sometimes because I desperately needed money. And sometimes just because I hated everyone in my old career or they hated me.
Don't stay at the job for safe salary increases over time. That will never get you where you want - freedom from financial worry. Only free time, imagination, creativity, and an ability to disappear will help you deliver value that nobody ever delivered before in the history of mankind.