Its a great idea for me. However, the first thing to be consider is the total adoptions of bitcoins in a certain community or country that you are living. If you think its widely used and more popular in your country, then it would be better. I agree with the one above that said that several payment options would be great. Bitcoins wider and bolder usage is rapidly spreading and I'm sure that your online store could attract more buyers from crypto world, so push that risky yet brilliant idea!