by Steve Dressler http://www.stevendressler.com/ http://www.newrepublic.com/article/121089/how-small-bitcoin-miners-lose-crypto-currency-boom-bust-cycle
Arabic Numerals introduced to Europe in Liber Abaci The Book of Calculation by Leonardo of Pisa ‘Fibonacci’ https://en.wikipedia.org/wiki/Liber_Abaci
http://redd.it/2xfw5f