Yeah. This is the definition of Bitcoin. But for the ignorant, bitcoin is an investment place that should be avoided. Too many people envy those around them and invest here and then leave sadly.
The real definition of btc is it is a decentralized currency or a cryptocurrency but a mutual fund might be a different thing although some individuals like the op think that it can work the same thing. I think there is nothing wrong with that as it's only their personal definitions anyway and that doesn't totally change the way btc works.
In this world, there will always be people who are ignorant and not willing to change this kind of attitude. Just let them or simply ignore them if they think btc a scam investment that must be avoided. I bet those people will invest more on those pyramiding schemes which are the real ones who are fraudulent.