If it were guaranteed that the price of bitcoin would stay the same as it is today, would you still buy it? My guess is, the answer is no. But if its value lies in being a currency, price stability is essential. And if your answer is no, how is it then not just a Ponzi scheme? In other words, everyone is buying it on the hope of someone paying more for it in the future, not to use it as a currency.
It is currently unusable as a currency for ordinary purchases, with the high fees you need to be spending a lot to make it even remotely worthwhile.
So yes my answer is no, I'm buying bitcoin for its future value and possibly for its utility if it improves in the future, but I am more bullish on altcoins which actually do something useful.