This was not a good year for the blockchain — at least as far as the value of its currencies. Bitcoin — the marquee cryptocurrency — peaked at around $20,000 at the end of last year. It’s been all downhill from there. Bitcoin’s price has fallen more than 70 percent since Jan. 1.

https://www.recode.net/2018/12/13/18106455/best-of-2018-data-charts-tech-end-year-list-amazon-facebook-juul-moviepass-elon-musk