Bitcoin has come a long way over the years, and it cam especially far this year. Despite being the worst-performing currency of the year in 2014, the digital currency managed to completely turn things around this year to become the best-performing currency in 2015. It’s value jumped by around 40% this year, and is sitting at $430.91 at the time or writing. There’s been a lot of interest in the blockchain technology that powers Bitcoin in recent months, which has the potential to revolutionize a number of areas, particularly the finance industry and the Internet as a whole.