What kind of question is this? Of course it can. Look at all the legitimate businesses using this technology. Overstock, etsy, Wikipedia, dish network, etc as well as all the individuals using the technology for small business.
Yes, bitcoin can used for good at those site that you said. But it is not so practicaly to fulfil our daily need, it still need time to send the goods. Not just for goods but also can used for sevice place too.