https://blockstream.info/address/1BgoUL3Mf8vDSDU4jjpFARKBJ6z...
https://blockstream.info/address/1BgoUL3Mf8vDSDU4jjpFARKBJ6z...
Uhh, source??
The information comes from a leveldb database you can download from peers after installing this client: https://github.com/bitcoin/bitcoin
They have a MySQL type database that stores IOUs for the people who bought the ICO tokens. They promise to deliver the actual coins once they finish the software, which in many cases has never happened. Others are less egregious than this and have working binaries on a testnet--the future main network is promised to deliver the actual functionality. There are a few coins (Cardano, EOS) worth multiple billions that don't have a mainnet or a working wallet.
They are also running a testnet for their staking capability, which will promote to the main net eventually -- but claiming they're not running a live net and don't have a wallet is absolutely incorrect.
OK, why'd you use this example as your entire response to "how do people know who has how many coins, for a coin which has reportedly never shipped a working binary"?
Can you answer the original question instead of linking an unrelated bitcoin topic?
To be clear, this isn't definitive, as he is one of many individuals suspected to be Satoshi Nakamoto.
As an unrelated side note it is worth reading his post from 2009 when we talks about having ALS: https://www.lesswrong.com/posts/bshZiaLefDejvPKuS/dying-outs... I have a memory of discovering this essay on hn, but I can no longer find the discussion. Maybe I remembered it wrong.
Edit: I found it https://news.ycombinator.com/item?id=867623