I don't think to quit my day job to go full time on bitcoin, it's very risky to me and even full time on bitcoin is more worth than my day job, i still choose my day job. Because it's not risky and someday i can get promote to the next level.
Getting promoted is a good thing but it should not be your goal, even if it pays well. Our jobs will only pay us if we can still work. So, we need to have some investments. Investments earn us money even if we do not work.
When you have a day job, getting promoted is normal, but always keep in mind that if you were promoted to the next level it means not just extra increase in your salary, it also mean extra increase on tasks that you will do... That doesn't mean that when you are promoted you will act like a boss...
But anyway, that's right, while we still can work we should save and make an investment, but those investment should not be a reason for us to quit our job, or our perseverance would stop there... Now, If you save and invest, for sure you will have a good retirement... Which I think you can't get in bitcoin alone if you keep on focusing on earning it...