The only thing certain about bitcoin is its volatility | International News Live Blog

https://internationalnewsliveblog.wordpress.com/2017/01/17/the-only-thing-certain-about-bitcoin-is-its-volatility/

"We see the biggest risk to Bitcoin being its substitution and/or parallel use by other crypto currencies" http://internationalnewslive.com/the-only-thing-certain-about-bitcoin-is-its-volatility/