I agree on your opinion that, whatever you can do with a traditional currency can be done with Bitcoin, Also we are now at the point that there are several companies which offer to purchase an item on any website and you pay via Bitcoin. And It's not currently the most easily accessible, but we are certainly making progress. Adding also my opinion that, The common uses of bitcoin these days Online and technology related goods and services,you can buy/sell online goods or service for Bitcoin. In addition, Common is that you can use it mostly anywhere like flat money which doesny require that you need to be there but you can use that anywhere you are, anytime you want that is the best thing because you are in control and you have the freedom and it will save you a lot of time.