Bitcoin is all about the underlying PROTOCOL, not the currency itself. Note that the currency only has value because the protocol is sound.
What is the protocol? Basically it allows you to trust a network in which you don't have to trust any participants. Think about that for a minute - THIS IS A PHENOMENAL ACHIEVEMENT.
Use cases for bitcoin? Who cares. Use cases for the protocol? Countless. Just give it time. Its existed only for ~6 years people!