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.
Basic economics is always needed for small or big business startup, some people are genius enough to have good business strategies without properly studying. But the number of successful entrepreneurs without even having basic economics are low. I am not saying that it will be necessary but you should be aware of the basic economics to compete in the market for better results and outputs.