In a survey done by The National Coffee Association, it was found that 64% of American adults drink coffee daily. This means that a majority of America gets their caffeine fix from coffee, and it's safe to say that caffeine is the most popular drug in America.
Coffee that have been freshly ground will always taste better because less air has been released when the bean is still whole. Once it has been ground, the airflow starts to get released and starts to become stale. The best tasting coffee comes 1 to 2 days at most after being ground.
Depending on the brand, it is sometimes healthier to purchase coffee beans rather than coffee grounds. Many grocery store brands include additives in their grounds so that it lasts longer. These additives are fine in small consumptions but over time can have an effect on your body.
There are two reasons why whole bean coffee is more expensive than ground coffee. High demand for ground coffee and additional additives in large brand ground coffee to keep it fresher.