The beauty of Bitcoin is that you can adopt it as wish and for whatever reasons you wish, being it for investment purposes or daily usage as currency.

And it doesn't matter what you are going to be called by other adopters. Who cares if a random Bitcoin adopter doesn't consider you a "Bitcoiner" just because you are mainly interested on the investment aspect of it?

It's a decentralized currency in a decentralized market. It's between you and Bitcoin solely. You don't have to adulate anyone, neither groups of individuals. As long as Bitcoin is being useful for you, that is great, and that is the only thing you should worry about.