2015 was a banner year for bitcoin. It brought some key developments for the digital currency’s acceptance, particularly by the financial sector. But like every year since its 2008 debut, bitcoin’s progress came with challenges.
Bitcoin has not been embraced by enough consumers, businesses and government to be called a mainstream currency or commodity. 2015 brought more signs that it is on the right path, and its naysayers have never been more discredited.
https://www.cryptocoinsnews.com/2015-year-review-banner-year-bitcoin-blockchain/