see potential in (someone or something)

You can "see potential" in an idea. It means that you think it might be a good idea, although the details might need to be improved a bit:

A: What do you think of the new design?

B: I think there are some issues to be worked out, but I do see some potential in it.

You can also see potential in a person - usually a young person who you think might one day become successful.

I see a lot of potential in you guys, but you need to keep working hard.

You can also say "___ has potential":

This idea definitely has some potential.