I agree with you! Bitcoin has no market price stability like currency. The price of bitcoin varies from time to time: sometimes up and sometimes down. So many people who are not bold in investing in Bitcoin don't even dare to invest in Bitcoin. In fact, many countries do not accept BTC.
So what? Price volatility is a good thing for investors. Every currency has price instability unless it is pegged to another fiat currency and backed with debt from a central bank. How successful this method of stability is can be seen in the Swiss Franc/Euro coupling or the egypt riad / dollar or .. or.. or.
But Bitcoin WILL growth to the most stable world currency that we ever know.
Bitcoin only ten years old and need more time how bitcoin could growing up and become most friendly payment currency at the future, compare with USD, EURO and other payment way I think is not fair because above payment have been thousand years and bitcoin only running about ten years, give space and time for bitcoin how to be global currency payment at the future and replace with fiat currency payment.