The anonymous creator of Bitcoin mined a considerable amount of BTC for himself when he released the Bitcoin twelve years ago. Those coins aren’t moved in the last decade, but Bitcoin it’s a public ledger, so you can check it, they exist. So the net worth of Satoshi is countable, and the community watches that stack very carefully. If Satoshi owns all of it, we are talking about 1.125 million BTC.
At current prices, this is roughly 40 billion dollars, whats means a pretty good spot on the list of the riches of the world. Of course, there is the rumor, he is dead. Or he had lost the keys. Or he doesn’t care. We don’t know the truth. But the coins are there, that’s sure.