or it could be a BTC developer. There is a team of developers that maintain this software. Don't tell me they are saints 
It might be related the miners. I don't think Bitcoin devs had such big chunks of Bitcoin in their wallets. However, it's pretty obvious related to the someone in Hal Finey's era. Only happy that addy is just moving his bitcoin, and doesn't have intention to sell it.
THIS is still very much maintained because we are in the final year of the 4-year bitcoin cycle so it still has the possibility,. the movement triggers market panic because it has the probability of the sale that will be done by the whale.
However, the rumor circulating is only the transfer and only updating the wallet to a new wallet from the old series, I also hope so, but if he sells it that is also his right.
If I see this I still feel that I am late to enter bitcoin, how beautiful it is when you are able to collect bitcoins cheaply, for free and also a lot.