Can Satoshi shut down bitcoin? Although he is its creator, I think he does not have enough authority to shut down bitcoin. Bitcoin is owned by the entire community and shutting it down requires consensus from everyone. So even if Satoshi existed, the government, FBI, and CIA would not be able to change bitcoin. It's good for him that he's anonymous, otherwise he'd be accused of creating bitcoin, a decentralized currency that makes it very difficult for governments to control it.
Bitcoin network runs by Bitcoin miners and Bitcoin full nodes. Satoshi Nakamoto can not shut it down and no single government can shut it down because Bitcoin network is decentralized. To shut it down, it must be a massive global effort from many governments or all governments to shut down the Bitcoin network.
They have to block access to download Bitcoin Core and other Bitcoin wallet softwares too.
https://bitcoin.org/en/download(This software is presently not available for download in the UK, and download links will not work if you are located within the UK.)
This is very big task and it can not be completed in my opinion.