Are you a nursing student? I'd focus more on what you LIKE doing rather than what will pay you the most.
Also, are you talking about as an RN, LPN/LVN? Master's prepared, nurse practitioner, etc? It makes a big difference.
I work in research and that is well paid, nurse managers and administrators can do very well too, depending on the setting. I'd wager though nurse anesthetists probably make the near the top but require a lot of education and training. My daughter is a new nurse practitioner and she and several of her colleagues have received offers in the neighborhood of $80,000 a year for a new grad. Nurses who work in the OR, ICU and other highly skilled specialties can also make a good salary. Much depends though on the state you work in and the type of institution.
All the money in the world though won't make a bad job good!