gold in them thar hills

Meanings

1. Used other than figuratively or idiomatically: see gold, in, them thar, hills.
2. An opportunity for something to be profitable and/or beneficial.

Etymology

Originally used in the phrase “there’s gold in them thar hills”, possibly a misquote of the phrase “there’s millions in it” (viz. the North Georgia mountains) uttered in Mark Twain's 1892 novel The American Claimant by Colonel Mulberry Sellers, a character thought to be based on Dahlonega Mint assayer M. F. Stephenson.