It's mined on Jan 2010, can't it be some other miner? The first purchase with BTC was from laszlo, who had at least 10000 BTC on May 2010, so, of course he was also an early enough who could have mined btc back in January. It was not only Satoshi.
So, it could be some other miner too whom we don't know. It's true that it could Satoshi too.

The transaction was in block 36539 which mean satoshi was not alone mining. So, we simply can't conclude it as Satoshi.

If you have more time to check the rest of the coins here are the addresses from the same user who held 3000BTC and moved the coins on the same day to  bitstamp. To be frank there is no point in chasing a ghost and it can be anyone who mined during the initial phase.

129Jrs2KFVDbmLUha6JbS9Wwpxh9iY6Gbr   
12Sj8QRtBTnuuBPbzKy8k44y1gY8v3yzDT   
12bmgaTvvnU16gd6mucyxhw8Uk6wMSEEv1   
12sA7BYfxE4LEy8QQywykNLvUMWNvZH7rX   
13CU7Xkiq8aRHegSDM9CMyUopRvapFvDmp   
13NJo2Q5kavszRp2moFQDZfr7tLX9nWVic   
14HF4mwhWeEc9VGMvUEK2HgxHoXbqUdHxt   
15int3wK1LFyfLufjqmdoWN9gkLnKsvW6B   
161z97QBoSi6AGc4GnjUZmGD8LeAx1x9sK   
16MdJJ5ynQTXpq6g54Bed65p4TN51LDNMB   
16SpiGMeEpwMqSURp7VbrNxU9v9wbMJkRx   
16efq7J2xy4ef1nXeeE9VMxAGLNYhmR9xr   
17UPZcfbWpd19nUf3KrpX2zQRJzFWvLhuX   
17roD76RcVAUn7ueLAKFoPoQDZ3aDHJ447   
18BwFCQqFpHHodLKRpC52AYgUjuKR1XKdP   
18Xe2Rj93qUBt3T3Fhk9tmE4WKToGBVWCP   
18YiEBFCBBZFWRmVKbzB9XBYDaw66yt9uY   
18Z6bx432gbRBSWjgwx4NGRujubZwdYyJL   
18fG7ThdWquPAJhXKSVd9PumhgQDYdQnDa   
19EsQvoJDbEfzaFPMy8siTuLVjDxNcDTRn   
19P8CUGTNzTqScUdj9tVvShkFv3akaw7A8   
19fyebtRkwthxGx6upj6c5iWi1fe6orQG              
19qgt3AgUPL4ftQxWX3ivKaYgrgrwM7s7H   
1AEDRogRwBP9T2SJ4jvoFdE8CvKD5ybdER   
1Bm3nYoaAdgyvppVNU4U9MRUgX9waee2XT   
1CJUXYtbCpsaKFUCyjCAXkw46urNQSsEZ5   
1CRbXtHaLLRBzgJpT91HFmfLbLqzahWYZH   
1DmiaY7W3DJhMe4dhysZ4p41YkbJ37jhHK   
1DnXL7u9cRfKKqdSB4dbQwE3b1VNNVVKjW   
1DuyfuoiP8gkVrNrhejTQ6QJ5qrwFExi61   
1EpL6QGHejGzb5ox2pjRZrDQApgVAxzJBK   
1EqXsKwdH2rb9uQueLZCB8DfhyDso8xWCL   
1FSSQ4siUJbPpKU8Dx57caVmWz3nHp2AFj   
1FWcYHEL8sMLrw2zjMzQ7D3BfpnZGEWSbR   
1FgoL4ECRXqZwmoP2NrFkYW4EuthTzbYSw   
1FnRSbMvdEtDL97vti246Y4Bm6DqxvFE6L   
1GE1DSJasobh6Pcjr6jxMPVia5X8Q2sL4r   
1GPivYCa629xMc5gHAqkVSRmm64LXx8Pek   
1GX6eDQfFmbswwRbF2XH7Bo3Ee4D2ES3To   
1GaJcu2DXZJKJPx9TFrrbn3x7vGidhEvHU   
1H6hnvmDqtJX87BhHyxKHTmrnRFpcrQ7zz   
1HHiVbggSnW4gMMQbGip1fHY6RHvMkb5at   
1HYF5jis9gE3Du4BJ8PVpeZGLq2JV6VZXt   
1HzZaM7zy2sz2KVXG6kbWLCZZHWTpzdRiF   
1J9bqpzGZyUR4VBV5smm2CDpEGeMXUtq1N   
1JtVnHAmAbmVXc93vfnfKnMK9yUFsQWHnd   
1KU35cMWuEAjGVHTL7iAa4DE1KvY7QsjS7   
1L3ca7WjY6YbVexLpMJgs3XBqca4JUM5SL   
1LmRHq3Nvrs4W4R6Phw98SRfxtyqLY3VXc   
1M8jsPMjxUSd2trZPyvsYdCbcknLu28fSE   
1MFLZkfewrtH2AbJtbAKYRPL5w7o4jRRJz   
1MdR8gEaSLrVBixkH5XYb4Tec68DZRw3fZ   
1NK9mak5NCk4p8kkieUexAerkHjSauRUrm   
1NfTFg5G14RwsSsux1A1sp1dwiHJn9rAHm   
1PboPWHR9eFboTfyjKzP1NevUodjuT5GFd   
1Phiqz6wxCcwRCEDks84ct1RM8yXvi76DY   
1QJPkiwmwLvDB69wgcwwz28NLorftzcEbG   
1QJS8LcmosiNFQEGeZBxkv1AtF5xcjKeB5   
1UMRx3yxVRQyj1kBxSE7fmoAcghTqhoNV   
1Xkcc4JEUvhpVzZmxCMGJWQjikcQxbzB2

An old miners that save his key and now want to make money from what he do way back 2010.

There is no way we can know if this is satoshi or not but its confirmed an old miners.

Maybe he just forget where did he stored the key but now he remember and find it for long time.

There were many miners around in 2010, I very much doubt it was Satoshi. It could have been anybody, I’m more interested in how they knew about the imminent huge dump.