for now I have never bought a product that can make payments using bitcoin, in my country bitcoin is still not widely used for payment transactions.
Lots of people didnt use their bitcoin till date because most of the investors want to earn money from their holdings and nobody wants to use their bitcoin. With the passage of time when more and more countries accept bitcoin and people buy bitcoin, the use of it will also increase. There are very few people who are using their bitcoin for their shopping.