I know several people who made money and some who lost a lot due to the girations of Bitcoin so I don't have any fascination either way. But from the technical side, bitcoin or blockchain used in bitcoin type electronic cash has at least one built in use. It cuts out the middle man in financial situations where "proof of funding" is necessary.
Proof of funding means, I know what your account number is and I know the balance ... right now.
Let us say, you have a volunteer fire department. There are a thousand inhabitants, that sign up for the protection. At any moment, the users of th