Cryptocurrencies Aren't 'Crypto'
motherboard.vice.com
motherboard.vice.com
btw, a lot of what's called "cryptocurrency" is actually more interesting and complex than just money/currency. some of these applications are focused on gathering and safely encoding consensus from groups of people, using cryptography. that's very crypto if you ask me!
Trivial use upon which the whole fabric of secure communications is built. Go read a book.