Bitcoin in its early days was marked as an asset for illegal activities. Slowly this got dragged as an asset for gambling. This way people had a negative opinion on bitcoin as an asset developed for gambling and illegal activities. Later trading practice began and the circulation contributed good to the further progress of the market. Now priority is for trading than as a currency. Maybe scenario could change in the future.
This is something that will eventually happen, a great deal of people are interested in earning money whether this is through trading or by holding their coins, and who can blame them when we see that bitcoin can grow so spectacularly in value in just a few months, so many people want the same to happen to them and they are not really using bitcoin is a currency but just as a way to make money.
However I really think that once bitcoin hits a certain level of adoption the amount of people that are going to want to trade it is going to diminish as they are going to think that bitcoin has reached something close to its maximum value and that is when we're going to see people using it as a currency.
