It's hard to describe a manager's opportunities because there are so many different types and levels of managers. Top-level executives are among the highest paid workers in the country. They are highly paid because their leadership skills directly affect company growth, economic survival, and internal vitality. Managers make decisions, develop resources, set policies, take risks, and motivate their associates, who may include financial backers. A senior executive in a very large corporation can earn ten times as much as a counterpart in a small firm.
Salaries also vary from industry to industry.
There are all kinds of good management opportunities out there. Every organization is looking for competent, level-headed leaders. Your first step is to find opportunities that match your interests and capabilities. Then study, learn form experience as well as theory, and make your knowledge work for you.