I don’t think Satoshi’s identity would change Bitcoin itself. The system is already decentralized and far bigger than one person. Of course, markets might react in the short term, but Bitcoin’s fundamentals—scarcity, security, and adoption—remain the same. Personally, I’d be curious, but I wouldn’t sell. The myth of Satoshi is powerful, but Bitcoin is stronger than its creator.
True. Bitcoin has done well without Satoshi for quite a while. All thanks to its decentralized and censorship-resistant design. But what if Satoshi is none other than the government itself (particularly, the US government)? Then such discovery would raise eyebrows. It might cause panic, resulting in a massive decline in market prices. At least, that's what I think will happen.
At this point, we should presume Satoshi is already dead. Otherwise, he would've already sold his BTC or moved it somewhere else. If the rumors are true, then Satoshi would be none other than Hal Finney himself. Him and Nick Szabo, of course. But this would be a wild guess. There are far more important things to focus on. When will the media and everyone else stop trying to figure out who Satoshi is or ever was?