Then someone popped into my mind (drumroll): the MysteryMiner!
Remember him? If this was before your time, here's a little explanation: In the beginning of March 2011, a huge increase in hashrate happened, it didn't last very long (about a week?) If I remember correctly, it was determined the blocks came from a single ip, not sure, though. Someone on #bitcoin-dev coined the name "mysteryminer" for the person/group behind that.
- Is this a coincidence?
- If so: Why else the extreme spike in "kept coins" in week 9?
- If not: Did MM keep all these coins througout the price rallying to $30?
- If so, why?
- Did he loose them?
Any explanation is welcome ^^
EDIT: Any speculation also welcome