I honestly don't think "tossing in 10$ to an index fund", i.e literally pocket change, makes anyone a /capitalist/. This is not an argument in good faith relative to the reality of capitalism we live in.
It was in good faith, I promise. I think there are multiple definitions of capitalist that are broadly used. I meant it in the “investor in a business” sense. Also, it may be important to reiterate: the idea isn’t to just invest $10 and be good to go. It was just meant to highlight the low barrier to entry, which is very different from buying a home.
