Well .. year-end holidays should be a fun time for everyone. But not for miners or Bitcoin investors. Because bitcoin prices fell quite hard, which is about 40% (more or less) in the middle of last week. although, in the second week of December 2017 Bitcoin has touched its highest level.
No reason to complain there: most miners or Bitcoin investors acquired their
BTC from 2009 to November 2017 (look at market cap) and are very happy with a
BTC/$ rate at least doubled.