Some people are confused about blockchains:
https://www.youtube.com/v/mLWhU3f0xlc?start=2948.1&end=2980.2&version=3&autoplay=1
https://www.youtube.com/v/U1XOPIqyP7A?start=163&end=356&version=3&autoplay=1
https://www.youtube.com/v/orQ0UJnw_eY?start=206&end=230&version=3&autoplay=1
I have written a book, to help explain The Blockchain: https://docs.google.com/viewerng/viewer?url=http://www.truthcoin.info/images/blockchainz.pdf
https://www.youtube.com/watch?v=Vcq0_h1_J30
...
It's like cash! (https://www.youtube.com/watch?v=G314jRumV_8&feature=youtu.be&t=4m25s)
this is a classic, I printed it and put it on my bookshelf next to Mastering Bitcoin
I like the book