It states, in part, that an avaricious individual, or just a naive and easily deceived one, is fair game for those who are sharper, quicker witted, or more worldly.
This statement reminds me of the saying, 'I don't need to run fast, I just need to run faster than you.' You outsmart the naive to get what you want. Success in America is only fit for the sharp, quick witted, and more worldly people that will do what it takes to get ahead in life.