As first reported by
@lookonchain, an old miner just moved coins mined on Jan 30, 2009 (close to 15.5 years ago). This is the addresses' only outgoing transaction.
https://www.blockchain.com/explorer/addresses/btc/1C4rE41Kox3jZbdJT9yatyh4H2fMxP8qmDCurrent value of the coins is $3,183,366. I checked and they did not move the Bitcoin Cash (yet -- its a piddly $17k).
I'm wondering who else could have been mining coins back then aside from Satoshi and Hal. I'm sure there was a handful of other individuals.
They paid a fee of $0.69.

What's also interesting is they ignored the inputs of 2 other deposits from 2020.
If they ignored the inputs then there is a chance that the transaction was auto. It's possible to build a transaction now wait some years, and then push it. That would explain why they ignore the last inputs.
It is weird to see this kind of block moving, it could be satoshi, or an earlier miner, or even a guy who found the privatekey by some kind of brute force and then just took the coins from it, but in that scenario, he would take the full balance and not just the main input. I think that's the trick, the ignored inputs.