According to conspiracy theory, Is it possible that the bitcoin was created by governments to gain financial strength in the modern world?
The consipary theory that you have said doesn't make sense. There is no evidence that support if bitcoin was created by governments at all. Even some governments do not want to adopt bitcoin in their country and try to restrict their citizens to use bitcoin.
My question is also because of this. Because there's no idea who Satoshi is, we can take the theory that maybe the governments have introduced bitcoin.
Satoshi nakamoto is really anonymous, indeed no one knows who satoshi is, even of satoshi is not anonymous maybe will happen bad things for him/her related to her/his alive.