Fast Company Senior Writer Mark Sullivan covers rising know-how, politics, artificial intelligence, giant tech firms, and misinformation. An award-winning San Francisco-based journalist, Sullivan’s work has appeared in Wired, Al Jazeera, CNN, ABC News, CNET, and lots of others. During the past week, Bitcoin abruptly fell to half of its November worth. The cryptocurrency, which had price greater than $67,000 per coin in November, dove from $42,369 on January 18 down to $33,113 on January 24. Low-cost currency transfers permit easy transactions between any two currencies, which some organizations find enticing as a resilient mechanism for commerce. “The Department of Justice…