Bitcoin was supposed to be used as a currency, not only a form of investment. However, it's been more successful as a form of investment, a "speculative asset".
Do you guys think that this can change in the long term ?
That fact is true, bitcoin is now more popular with its investment attractiveness, people are more interested in getting profit from bitcoin compared to using it as a payment tool, besides that the price is very volatile which makes many merchants still doubt bitcoin as a substitute for money.