More speculation: There's a chance that it's related to:
/index.php?topic=5547249.0Because the timestamp of the OP's last reply to confirm his doubts has a relatively good gap after the 10k BTC transaction's timestamp.
His last post was
before the transaction, not after. It would be cool if it's him though. Somehow that scenario sounds a lot more fun than someone who has sold similar amounts of Bitcoin over the years. From zero
tres commas 