On this day in 2014, the first bitcoin bearer instrument,
Opendime, was announced by Coinkite. Designed as a tiny USB stick that holds a single Bitcoin private key, Opendime allows BTC to be physically passed from person to person like a gold coin or dollar bill -- no blockchain transaction needed until the seal is broken. It introduced the concept of "Bitcoin credit sticks" and trustless physical Bitcoin transfers to the community.
Disclosure: Coinkite Inc. is the maker of this product and the publisher of this site.