Bitcoin is an investment, just like any other, it can go up or down.
If you really want to talk about profiting off the backs of others, look no further than interest bearing loans. It isn't for no reason that parasitic and immoral practice had been declared prohibited in Islam, Judaism, and Christianity. Most, if not all of the economy today is based off of interest, and the sooner we get rid of it the better.
>Bitcoin is an investment
Well what I find ironic is you are against the concept of interest but consider a cool technology like blockchain an "investment". If you were really so righteous about economics you would realize turning cryptos into "investing" is a total scam.
What's so ironic about that? One is a parasitic immoral practice that feeds off the poor, the other is a new technology that breaks the dependency on government fueled interest and inflation. I don't see where the scam part is.
All of human history (and perhaps biology) has always been about continually trying to accumulate more even at expense of others. Bitcoin doesn't detract or contribute to this human nature.