The "Marx quote" often quoted in many newspapers and magazines describing the greed of capitalists in pursuit of profits was not said by Marx, but by Dunninger. This famous quote is: "As soon as there is an appropriate profit, capital will be very bold. As long as there is 10% profit, it will be used everywhere; if there is 20%, it will become active; if there is 50%, it will cause Positive risk-taking; if it is 100%, it will make people ignore all laws; if it is 300%, it will make people not afraid of crime, and even not afraid of the danger of hanging."
In Marx's "Das Kapital" Part 2. There is this passage in the notes in Section 7 of Chapter 14, "So-called Primitive Accumulation." The original text is as follows: "The Quarterly Reviewer said that capital would be timid in avoiding turmoil and strife. This is of course true, but it is not a comprehensive truth. Just as nature is said to be afraid of a vacuum, capital is afraid of no profits or too small profits. Situation. As soon as there is an appropriate profit, capital will be very bold. As long as there is 10% profit, it will be used everywhere; if there is 20%, it will become active; if there is 50%, it will lead to active risk-taking; 100% will make people disregard all laws; 300% will make people not afraid of crime, even the danger of hanging. If turmoil and strife bring profits, it will encourage smuggling and slave trade. Evidence. (Denninger: "Trade Unions and Strikes" p. 36)" (see "Das Kapital" Volume 1, p. 839, People's Publishing House, 1958 edition).
Although this is not a famous quote made by Marx, it does not affect the objectivity, fairness, science and brilliance of the above conclusion. The reason why Marx used it as an annotation is to explain that the process of primitive accumulation of capitalism is full of "original sin" and the greed of capital. Judging from the process of primitive accumulation of capital, it is at the expense of morality, challenging the law, and contempt for human nature, and is full of blood and filth. "Capital comes into the world from head to toe, dripping with blood and filth from every pore." At the same time, Marx used Denninger's description of capital's crazy pursuit of profits as an annotation for his own argument.
For details, please see "Marx's famous quotes":