Bitcoin’s success is putting it under growing strainhttp://www.economist.com/news/technology-quarterly/21590766-virtual-currency-it-mathematically-elegant-increasingly-popular-and-highly?spc=scode&spv=xm&ah=9d7f7ab945510a56fa6d37c30b6f1709 by pkallberg • 13 years ago 2 0 13 years agoECeconomist.com