I came to figure out, why would a consumer/customer use Bitcoins?
You have to pay the 3 cent fee, while you dont have to pay anything when paying with a credit card.
So what is really a benefit for using Bitcoins, customer wise?
The simple answer : Bitcoin is more safety than credit cards.
But for the time being, there are not many places you can use bitcoin. Maybe in the future, the bitcoin is accepted everywhere.