With bitcoin, you can do anything. It all depends on what your goals are.
You can simply hold it, or you can buy the goods using bitcoin. You can use bitcoin as an investment.
Okay, but for me, we should use bitcoin on the things that we do need, and worth to buy using bitcoin, I mean those stuffs that could only be bought by using bitcoin. As long as we could buy something or go to somewhere, travel around the world using fiat, then we don't have to use this bitcoins, because for me it is like we are throwing away our profits that we could have in the long run in saving bitcoin.