Your personal opinion is a huge possibility? What is huge? 1/3 .. 1/10?

Its already shown that the block wasn't mined by satoshis main-miner. Makes it more unlikely it is satoshi himself. Its more likely (in my opinion ) that its someone who has done a well timed move and don't need that coins. One of the few early miners ... Coins from the same miner were moved already in the past in 2011 and 2015 (thats after satoshi dissappeared)