The limited supply and the distribution process leads to the analogy of gold. It's not hard to also see the similarity of something that was once a universally used as currency also being considered an asset and therefore an investment. While I don't disagree with what you say I think it is inevitable and unavoidable that many people will view Bitcoin as digital gold and an investment.
yes true, bitcoin is like digital gold, everyone can pay with gold and everyone can invest with gold, who does not want gold? is gold only for payment? I do not think so!
Bitcoin can be mined, gold can be mined, so I think both have a lot of similarity and one of them as payment and investment is not just as a payment
Bitcoin is a digital crypto currency and it is not necesary to called it as an investment, Normaly it is use as an investment that is why some other people around really called it as an investment. But for me we don't have to called it as an investment because bitcoin has used in many ways of gaining not only on investing.