There are two factors that affect the price of bitcoin, it is supply and demand, these factors determine the current price.
Well, for me the fluctuating market value of the bitcoin and other crypto currencies is something which can affect the earnings of the individual which has invested his money into the crypto coins but for now, it has not that much string influence that it can affect the economy of the country. It will only affect the economy of the country when the government will declare these crypto coins as a legal currency and will treat them like normal currencies.