If you like to do business economically you can study economics, but there are many successful entrepreneurs who do not go to universities that they are rich from their own experience as well as their bravery so the need to study economics is not necessary.
It isn't necessary, but it helps and the people who are successful in business without going to college are probably outnumbered greatly by those who did (but that's just my thought; I have no data to back it up).
My major in college wasn't economics, but I took a few elective courses in economics--Basic Economics, Corporate Finance, and Intro to Econometrics. I enjoyed those classes enormously, especially the corporate finance one which was about stocks, bonds, derivatives and basically investing. Even if you're a computer geek (or pharmacy student), you should at least take one or two elective courses in econ, because they're pretty useful and interesting. Business never really interested me until I started making money, and I probably wouldn't have majored in that or econ, but I'm glad I took the classes I did.
If you watch TV at all, you probably watch the news. You constantly see financial reports about jobs numbers and the stock market, and having a bit of education in finance helps you to understand what's being reported. You don't have to be an entrepreneur to benefit from it.
There are people who are successful business men and women but at the tail end you will see that they will engage the services of an Economist. If you study pharmacoeconomics when you were a pharmacy student, you will see that the importance of economics covers all areas of works in the society and is worth encouraging for people to major at the university.
