A trend has been started that bitcoin is now used only for raising income by buying and selling it but we are ignoring its most important fact that it was created to be used as currency and if it can be used as the currency it would really help community to enjoy its eases and regions who are accepting btc must have to start it as currency this will automatically boost user no's as well a prices,
It totally depends on the mode you want to switch yourself to. Both are good, but we both know if you invest it properly, it is more like multiplying what you have which does not mean you cannot do the two.
Spending is important and if trading is normally not even going on right now which is still part of currency mode as far as I am concerned, we won't be seeing the fluctuations we are seeing. Certainly we cannot deny the fact that it is not widely accepted yet, which is what makes the currency mode difficult without having to convert to fiat before, but it is a gradual thing.