Yes, I agree with you. Considering Bitcoin as an investment without developing and making use of its core value is the root of  money scamming and ban for governments. I don't disagree that Bitcoin is a good investment but it wasn't created for that purpose. I know that some regular currency like USD or Yuan are also speculated as an investment. But these currency never go too far from their main purposes - to be used in real life. That's partly a reason why in general, regular currency much stable than Bitcoin. What I mean is Bitcoin should be used as both an investment and a medium of exchange, but the function as a medium of exchange should be fostered.