If you want to borrow an idea from an author, but do not need his or her exact words, you should try paraphrasing instead of quoting.
Most of the time, paraphrasing and summarizing your sources is sufficient (but remember that you still have to cite them! If you think it’s important to quote something, an excellent rule of thumb is that for every line you quote, you should have at least two lines analyzing it.
In this case, however, the paragraph following the one quoted explains that the author is referring to money, so it is okay.
As a general rule, it is okay to make minor grammatical and stylistic changes to make the quoted material fit in your paper, but it is not okay to significantly alter the structure of the material or its content.
However, just skipping it would not work -- the final sentence would not make sense without it. In order to do so, you will need to use some editing symbols.
Your quotation might end up looking like this: In his essay, “United Shareholders of America,” Jacob Weisberg insists that “The citizen-investor serves his fellow citizens badly by his inclination to withdraw from the community. by focusing his pursuit of happiness on something that very seldom makes people happy in the way they expect it to.” The brackets around the word [money] indicate that you have substituted that word for other words the author used.
You Tube videos embedded in accordance with clause 4A of the You Tube Terms of Service Some of the examples in this Guide were taken from Purdue OWL, Miami University Library, and Red Deer College Library Understanding the rules of citation in academic writing will also help you to avoid plagiarizing unintentionally.
Plagiarism means taking someone else's words or ideas and passing them off as your own.
Keep only the material that is strictly relevant to your own ideas.
So here you would not want to quote the middle sentence, since it is repeated again in the more informative last sentence.