Holistic success is important. Holistic success includes mental, spiritual, physical, emotional, and financial health. Thus, it boils down to how well you balance all of these forces.
Most people’s success is lopsided – this can be due to professional, financial, fitness, and familial influences. If you concentrate most of your energy on only one, sooner or later you realize the neglect on other fronts. If you focus too much on money and lose your physical health, you will be forced to realize that just money cannot buy health. If you focus too much on your profession but ignore your family, you will not have anyone to share your success with.
Ultimately, you have to define what balance means to you and invest your time and energy in achieving it.