Did satoshi came back to spend his coins ? A very early miner or an early OTC buyer decided to take profits...
I don't think Satoshi came back, maybe some person found his forgotten wallets, or came to know that he/she has the BTC in his wallets but this possibility can not be applied here as i can see wallet was taking transaction till May, 2021. So i think the owner was aware of this wallet and do know the potential of BTC but question is why he didn't book any profits back in 2021 when BTCwas ATH and why he transfered the funds now. I hope he is not wishing to sell hem now, or maybe he wants to moe them to another safe place who knows. There could be many if.
I think new generation investors should learn from this as it can be a good teacher or point to learn from. Atbthe early stage these investors bought or mined and kept for a longer time believing their investment to pay back after a long time and here this particular investor took profit not just profit but a good amount of money for holding a long time.
OP your points are quite alright maybe a good follow up might reveal more to the wallet activities.
You are totally right about getting lesson from this wallet's owner. But still, many investors can't do the same as this wallet owner did Like no output in the last 13 years. Only money going in. Like he was a miner back then and not now. And I don't have a rough idea about how much it cost back then in mining l, but i do know he must have another way of earning money from where he face the expenses of mining. Point is, holding do pay off and make people rich but this person would be more rich when BTC was at ATH, well maybe as i said earlier he must have some other plans. I am wondering if he keep them hold more and sell even close to new ATH then he will make more than enough money (haha i know money is never enough)