Do you think that someday the prices for Bitcoin will fluctuate less and ppl will be able to use more as a currency, and not only as a form of investment?
Yes, I believe it. Bitcoin will more stable in the future, when the market demand and supply is balance.
The demand and supply balance have nothing to do with the fluctuation, it's natural law that there'll always some kind of difference in amount of demand and supply but however the factor that could make bitcoin fluctuate less is the market capitalization, the bigger, the harder to manipulate, as you know, bitcoin is still vulnerable to price manipulation that could threaten bitcoin's stability, therefore bigger market capitalization is required.