It seems that the most of the traffic comes from China. I bet you don't know anything about China and why are they using Bitcoin right now. Until you find out you can't emit any statement because you just don't know. There can be several reasons. Maybe the communist party doesn't allow people to have more than X amount of cash on their possesion, maybe it's hard to move money there, maybe maybe maybe.
Edit: made a quick google search and found this "China employs strict currency regulations that are designed to prevent large amounts of currency moving out of the country" So there is a real use there if that's still the case. I bet there can be many more that for us maybe are useless.