I don't think it's a lost wallet that was recovered because the address has been constantly receiving a monthly reward of 0.0000547BTC. If it were other tokens I would have probably thought that the owner staked it in a kind of staking program that generates reward and when the time has elapsed, he/she decided to withdraw it to a different address.
These transactions are not from staking ( coins are not on an exchange ) , they are dusting attacks
https://coinloan.io/blog/how-dangerous-is-crypto-dusting-attack/ .
That 547 satoshi is a common used amount for this kind of attack .
And then we will speculated if it is Satoshi where in fact we know that he is not coming back?
How do you know that satoshi isn't coming back ? Do you have direct communication with him ? Do you know something that you should share with us ?
Was there even a way to buy Bitcoin over the counter at that time?
There was always a way to buy OTC . Someone could have posted an offer for selling his mined btc and a buyer took it . The first transaction of the whole batch was made in 2013 , so it could be an otc buyer .
As for the comments i saw about why investigating , bitcoin is pro anonymity etc .
This is a public ledger , that's what makes bitcoin different and that's why it was invented . Anyone can see what's going on onchain . Your privacy is protected by the protocol , but you can't be anonymous .
For me it's an important thing if satoshi comes back and move his coins . It would mean that a bag of 1M+ coins will flood the market . Such a move could send btc to low prices , if not close to zero . If you guys don't understand the value of having the information firsthand then i feel sorry for you .