An extremely early Bitcoin player is moving coins around, and it just happens to be on the same day 'Satoshi Nakamoto' was doxxed. Coincidences are usually ignored, but now we're talking about $118 million dollars worth of coincidences.
edit: source - https://bitslog.wordpress.com/2013/04/17/the-well-deserved-f...
Just that it was the 289321th block to be mined on the mainline of the blockchain.
> what about the other transactions of the 289321 block?
These are just transactions that happened within approximately 10 minutes before the block was mined (precisely, those that reached the miner between 06:22:28 and 06:34:54 today -- times in UTC I guess).
Block is just a set of transactions. New block happens every 10 minutes and contains all the transactions that all the bitcoin users sent during that period.
So, this one transaction is interesting because it involves an old address. Other transactions in this block are probably unrelated.