Until the day that bitcoin is the only globally accepted currency, and by that I mean the only currency in the world, then of course the price will matter. Frankly I don't think that day will come and so for me the price will always matter if I own some bitcoin. I would own bitcoin with the hope of growing my dollar amount.
I agree many people was actually invested on bitcoin because they want to get a profit out of it ! meaning the price will always matter ! Imagine if bitcoin has no value I doubt if people will still use bitcoins.