Perhaps he/she did not brag about him/herself. If there was someone else, he probably had already appeared. Imagine, you create a system that whole world speaks with admiration, and you still remain unknown.

It's quite easy to stay anonymous with the different types of applications and techniques that can be used. IP hiding is one of them and who knows, he may or may not have used multiple accounts to hide himself inside the sea of people.

Everything is simple. He is just not working on Bitcoin anymore and not showing himself to the public. So he literally keeps staying anonymous by doing nothing.
Exactly the same will happen if you create some forum account, announce some project, work on it for some time and then leave it and will never use this forum account and keep living your life.

I know an easier and more efficient method. And it's completely free.

I'm creating a paper wallet by closing access to the Internet. Then I print it again with an offline printer. Moreover, because it was very simple I did it 25-30 times in a row and I took out each one (2 copies). What I don't use is that they're standing there. I put a public key of these wallets into Google Drive with an excel file. When any amount is entered, I process the transaction with my mobile device and follow the status of the wallets.

I've also kept these wallets in two reliable locations. Also for the time being, a wallet is used in a flash disk.

Yes, Ledger, Trezor and others can be useful. However, the easiest method for investments that we call HODL is still a paper wallet and I think this is a method that is fully compatible with the nature of Bitcoin.

Don't you think that I anonymous to you.
I guess, Satoshi is not greedy , Satoshi never touched the coin when they are at ATH. Never want to take the fame personally.
I do not think such selfless person's exists in today's world.
My intelligent guess is Satoshi died  before Satoshi can reveal the identity and got anonymous forever.

I think Satoshi stay anonymous because on it's security and safety. They said that he hold many bitcoin so he is so rich businessman. And who no one know if Satoshi is real or he is only a name that symbolized bitcoin. But for me it doesn't matter who is he or if he is real. Important thing is I already know how to use and how to handle bitcoin.

I think Satoshi is very paranoid. All his communications are online, and if you know how to use the right tools, you will be very hard to track. Even in all his communications, he avoided topics that are personal. Most of his discussions are about improving bitcoin and this site. And once the government started sniffing bitcoin, he totally went dark.

As everything associated with bitcoin or cryptocurrency is functional through the internet staying anonymous isn't a big deal. Bitcoin development further happened in a perfect way though Satoshi stayed anonymous. This is the true growth, and now the community keeps on widening with large level of adoption and Marketplaces accepting bitcoin.

actually i believe he may not have stayed as anonymous as you would think. somebody said TOR but that would only mean for his online (web) presence not his node. as far as i know the early versions of bitcoin-QT did not support TOR, it was added in much later versions and that means if he ran a full node you could have known his IP address.