We can't predict for long term but for 2 to 3 years bit coin will be used as the medium of exchange of goods and services. In coming future btc will have the highest value of all currency. If I see it as 10 years from now than it can be the currency of some country as dollar.
Bitcoin in 10 years time will be more stable crypto currency in the trading market, it already survive the first 10 years in the trading market when it was launched in 2008 by Satoshi Nakamoto, base on the market preview the price value of Bitcoin goes up to the roof after ICO introduction. yes, it is just normal market reaction when the price value of Bitcoin goes up and down depending on the volume investment put in into the Market investment for Bitcoin, Market is Volatile, Bitcoin will be one of the leading currency in the future market trading.