The coffee shop industry is making billions dollars a year. Even though opening your own coffee shop looks like a piece of pie and definitely profitable enterprise, it is not exactly like this.
The value of a cup of coffee is around $0.50 and the retail price is between $2 and 3, depending on the market. It sounds like profitable margin. But you have to keep in mind that operational costs for a coffee shop are quite high. On top of this you have to add the fierce competition by well-established chain of coffee shops with strong marketing and huge advertising budgets.