Economist 1988 predicting world currency by 2018 https://socioecohistory.wordpress.com/2014/07/26/flashback-1988-get-ready-for-a-world-currency-by-2018%E2%80%B3-the-economist-magazine/
David Chaum – Blind Signatures For Untracable Payments http://www.hit.bme.hu/~buttyan/courses/BMEVIHIM219/2009/Chaum.BlindSigForPayment.1982.PDF https://en.wikipedia.org/wiki/David_Chaum
