recaping some recent cryptography links

a good 'simple' explanation of block chains that if i was given the text would have taken me a minute to put up on the web, but goldman sachs have no doubt spent $10,000 to make it almost unreadable !
http://www.goldmansachs.com/our-thinking/pages/blockchain/
these funds can swing huge sums in seconds so i feel that cyrptocurrencies will be a dangerous playground with them, but money can be made !
good charlie rose interview
https://www.youtube.com/watch?v=_cycaD53Ly0