Whatever you can do with a traditional currency can be done with Bitcoin. 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.
It's not currently the most easily accessible, but we are certainly making progress.
Another benefit is when you can exchange bitcoins with paper currency.
You can do a lot of things related to the use of bitcoin.
Because right now I realize that not all companies can accept bitcoin as their payment tool.