to have something very valuable that is not yet realized
tener algo muy valioso que aún no se ha dado cuenta (tener algo muy valioso que aun no se ha dado cuenta)
"That old property is worth millions — you're sitting on a gold mine."
"Esa vieja propiedad vale millones — estás sentado en una mina de oro." (Esa vieja propiedad vale millones — estas sentado en una mina de oro.)
to use something as a resource
You said exactly what I was thinking
to succeed or progress in one's life or career
to waste time on a topic that has already been resolved
to slow down or stop an activity
to find a problem or defect in a system