Digital Currency is an Internet-based medium of exchange with properties similar to physical currency. Can you observe the serial number on any given dollar bill? Digital currency is the the serial number without the paper!
Additionally, with a special division of digital currency called cryptocurrency, this serial number is blockchain encrypted. Crytocurrency is truly the marriage of computer science and finance.
Bitcoin, created in 2009, was the first cryptocurrency.
Blockchains are special mathematical algorithms used to create an exceptionally secure, shared digital ledger that can hold a vast amount of data. Blockchain technology is best described in the
Casey Research Report and the McKinsey Report and by Don Tapscott, author of The Blockchain Revolution, featured in the TED Talk video below.