But aside from that, I doubt even a authoritarian world government/leader will be able to stop Bitcoin.
Stopping Bitcoin? No, because the government is centralized, while Bitcoin is decentralized. They can’t shut down the network. The best they can do is try to discourage people from using Bitcoin through regulations. But that fear isn’t a big deal anymore since major countries have already legalized Bitcoin, which means we’re here to stay.
The fact Bitcoin is decentralized, it can't be possible for the government to stop it. Like you do said the government might try to stop Bitcoin those close to them not to buy Bitcoin but they can not stop the whole world from adopting Bitcoin. Bitcoin is free for everyone to own when they are ready to invest. Even some government knows the benefits of Bitcoin in the future that's why they have legalize it in their country but still few developing countries I think have adopted to the Bitcoin technology yet.