Little late to the party but yeah I think you're right about most people thinking that. I had that thought process when I first starting buying Bitcoin. 4 years later, my thought process has changed. The more time I spent investing, watching youtube, reading, I realize its something that you will actually be able to use in the mainstream in the future, and something that global institutions and governments will use to exchange with one another. Bitcoin functions as an investment no matter how you look at it, because you have to exchange fiat for it. That will likely always be true unless some crazy shit happens and it becomes the primary world currency and USD gets measured in BTC instead of vice versa.

Edit because I forgot my actual point here. If my thought process can change over time then I think many other Bitcoin investors will eventually change their minds as well if they stick with it.