This might be a hot take (that’s why I put it in a separate comment), but I think that the system is bad doesn’t mean (in my personal opinion) that it’s morally wrong to use it, at least if you take care that you don’t invest in really awful stuff like coal. Especially since the rich ones use it, not using it just leads to a bigger gap between poor and rich. Living and wanting to improve the society doesn’t mean having to reject it.

(I’m open for any arguments though.)