I heard that Satoshi holds over 1M bitcoin on his wallets
You heard bullshit
There are approximately 24,000 unspent 50-BTC P2PK TXOs, each with a different pubkey. They were not mined by only one person
A theft of 1M btc would cause chaos
What theft? Anybody with the means to sign a txinput can spend a UTXO
What chaos? You're making a doom assertion without explaining what you're frightened of