When you compare the number of people who has using bitcoins to those who are not using, those using bitcoins are few but their number is significant. Personally, I use bitcoins to buy airtime for some cellphones, pay for online services, exchange for fiat and even use them to lend to others.
Bitcoin gave the power to people to act as bank institutions, lending and borrowing money around. There are plenty of activities one could do using bitcoin instead of just holding it.