The most important thing for bitcoin is to be realized for its intended purpose-as a currency. If this is done, it means that he has fulfilled his purpose. And the price is not really the most important thing.
In my opinion the success of bitcoin is bitcoin has been recognized as a digital currency, and is used in many countries. If that has been achieved, it means that bitcoin can be a companion to fiat currency. Besides that the price of bitcoin is not too expensive, because the more expensive the fewer can afford it.