What is a Walking Liberty Coin?

Excuse me, could you please elaborate on what exactly a Walking Liberty Coin is? I've heard of it in the context of cryptocurrency and finance, but I'm not entirely sure of its origins or significance. Is it a type of digital token or does it have a more traditional, physical form? I'm particularly interested in its historical background and any potential investment value it may hold. Could you provide some insight into these aspects, as well as any other relevant details about the Walking Liberty Coin?