Trade =/= capitalism. Capitalism is maximum enrichment for a few at the cost of the many. "Capitalizing on an opportunity" doesn't usually seem to get interpreted as "get what I need and hopefully what I want in an exchange that is equitable, just, fair, and negotiable to all parties"; instead, the common meaning seems to be "get all that I can as quick as I can in exchange for the least possible expense on my part", which is not even a full step away from 'The Tragedy of the Commons, ' or, "if there's not enough for everyone to have as much as they want or need, then everyone who takes as much as they need is evil, and if someone is going to be evil AND ALSO have enough than that person is damn well going to be me." THAT'S capitalism.