When you trade your fiat into Bitcoin, you aren't investing in a company. You are investing in a network.
Why does in matter who this Satoshi person is? The fact that Satoshi is anonymous and not one of their 1 million Bitcoins has moved should give you more confidence in diversifying into Bitcoin. You don't need to worry about a CEO dumping his shares to buy a social media platform.
In a world where the elite are competing for the spotlight, power, and hyping up their stock prices, doesn't it make sense to invest in an asset priced by supply and demand?