Why should we choose if it should be an investment or currency if it can be both? Remember that currency like usd can also be an investment so why not with cryptocurrency that is way better investment that usd because of its high volatility. And also ask yourself where can you use your Bitcoin, in some places I agree that there are already some uses for it, but how about other places that merchants and stores still don't want to add Bitcoin to their payment options? so people there have no choice to use it for payment. For me before this thing to happen, businesses should start adopting Bitcoin payments and also people should be willing to use their Bitcoins as payment, because it is useless if businesses will just adopt it but no one wants to use their Bitcoins.