1. Did Satoshi make all the decisions perfectly as relating Bitcoin before his disappearance? Perhaps, he made proposals for decisions as regarding the validity of blocks in the blockchain, but this to me is not enough to apply in all aspect of an elephant coin like Bitcoin.
You can try to dig all his
email exchanges with Hal and his forum
posts.
2. If Twitter, Facebook, Amazon, Tesla to mention but a few, including other cryptocurrencies are embattled, we all know the faces that will spring up to defend the project. What if the world unites against Bitcion and demanding a representative to reach a consensus, who will represent Bitcoin.
Nobody should represent Bitcoin but, if each Government organization will work together to identify all developers contributing to the Bitcoin Core, they can probably do it.
3. Is Bitcoin a legal entity? If yes, who represents her in the eyes of the law?
The Bitcoin owner and maybe not the Bitcoin itself. It therefore means, that the Bitcoin owner can commit a crime with Bitcoin and not Bitcoin committing crime itself? Please, can someone address this for me?
No, Bitcoin is not a legal entity. Think of Bitcoin and BTC in the same sense as fiat. It's a tool that anybody can use but a tool isn't responsible of how it's used by the owner.
4. Dear Bitcointalk users, are there some decisions you feel Satoshi should reappear and address, or are all things pertaining BTC in order?
None.
5. Maybe Satoshi has not actually moved on, he might be in background actively participating in Bitcoin. I said this because;
6. I read the controversy behind the creation of Bitcoin cash. If such scenario happens again, and more than 51% is on the negative side of the election, what will be the fate of Bitcoin?
What controversy with BCH? Do you mean to say BSV? That's the one attacked recently. In the unlikely scenario of a 51% attack on Bitcoin, its reputation as the most secure blockchain will be destroyed. Who knows what might happen after that. Perhaps it could lead to a market crash.
Also, Satoshi not moving on is unrelated to your no. 6. Are you implying that he's part of the attackers?
7. I wouldn't ask how will the decision be made when 21million bitcoin is mined, because I know it can be decided due to open source code of bitcoin. What if before 100yrs time, a new world order emerges that will render Bitcoin a menace, who will order the halt to save humanity?
Let the next generation deal with that when it happens or about to happen.
8. I believe there is a decision making board for bitcoin order than the people as being portrayed.
Who knows? Nobody is preventing the miners, node operators, and developers to work together.