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 ?
This can change, but only when the price of bitcoin stabilizes and fluctuates in the range of not more than 10%.
In practice, such a stable price is unfavorable to traders who make their money by buying in the dip and selling in the highs. So I think we will see great volatility of crypto for yet another several years.