If you, like at least 99% of the world, are a worker, and don't have enough wealth to live off of interests and dividends alone, you are buying into your own exploitation when you own stock via a 401k or mutual fund. The bankers and traders managing those funds invest them in such a way that companies that bust unions, outsource jobs to the most exploitative regions, pollute the air and water, etc get the most money, because those are all ways of externalizing costs from capital onto labor.
Fuck this petite-bourgeoisie nonsense. If you know what's good for you and your class, save your money to buy guns, explosives, a hidden cash and prepaid credit card stash to fund strikes and insurgencies, etc. Invest in the tools needed to rise up and destroy your bosses.