be sitting on a gold mine

be sitting on a gold mine

To have immediate access to a plentiful amount of something valuable or desirable, especially something that one has not yet profited from. Who knew that my grandfather was sitting on a gold mine of priceless antiques all these years? If your social networking site is attracting millions of new users every month, then you guys are definitely sitting on a gold mine.
See also: gold, mine, on, sitting
Farlex Dictionary of Idioms.
See also:
  • a bird in the hand is worth two in the bush
  • (I) wouldn't (do something) if I were you
  • a slew of (something)
  • a fast talker
  • a slue of (something)
  • a/the feel of (something)
  • all right
  • a horse of another
  • a horse of another color
  • a horse of another colour
References in periodicals archive
As to whether Co Armagh could literally be sitting on a gold mine, he added: "That's the ultimate goal and what we are hoping for."
Colombia could be sitting on a gold mine, several of them actually.
As to whether Co Armagh could literally be sitting on a gold mine, he said: "That's the ultimate goal and what we are hoping for."