Select the most appropriate meaning of the given idiom.

Sitting on a gold mine

to own something potentially valuable

The most appropriate meaning of the idiom "sitting on a gold mine" is to own something potentially valuable.

This means that you have something that is very valuable, but that is not being used or appreciated. The idiom is often used to describe someone who has a lot of potential, but who is not doing anything with it.

The other options are not correct.

• Secretly hunting for something precious: This does not mean to own something potentially valuable.
• Not availing of an opportunity: This does not mean to own something potentially valuable.
• Wasting a vast treasure: This can mean to own something potentially valuable, but it is more often used to describe someone who is squandering something that is already valuable.