Pots of Luck

You never know what you're getting with potlucks. You take your chances.

The assumption is that one finds one's self in a situation where one takes a chance that whatever is available will prove to be good enough.

A similar viewpoint simplifies and says whatever is available at the time.

Then there are jackpots and, from what I understand, there's a pot of gold at the end of the rainbow. Not that gold is exactly the same as luck. It's implied in this case.

Anyway, I think luck and chance are about the same.