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.
Basically, economics is for the people who want to build businesses in the future and this subject will help them to become successful. Studying at university will improve you knowledge about businesses and economy. In addition, we must study economic especially if we want to build a business because we could how to work it in industry and you could what is demand in economy.