In November, when Bitcoin hit $900, sparking exciting Facebook discussion from rationalist friends, I wondered if I should buy some. Then I rehearsed the standard arguments against doing so and kept my money where it was. Because of this, I didn't lose any money when Bitcoin crashed in December, and finished the year about $1400 ahead on some very boring stock investments.
Upvoted less for teh Bitcoin thing but for using a boring sensible option. Was it something like an index linked fund?
As in Joshua Blaine's original description (below), but may be used to brag about things you've accomplished either this month (January) or the previous one (December), assuming that you haven't brought it up in any earlier Monthly Bragging Thread.