I want to know how Bitcoin came into existence
In short, Satoshi Nakamoto had sex with the banking system, and then, after nine months, the bitcoin was born.
If you want to read about it in more details, I would recommend the books of Andreas M. Antonopoulos. By the way, you can find a free version of Mastering Bitcoin book in his github repo: https://github.com/bitcoinbook/bitcoinbook
where it will be headed in the coming future. Please share your perspectives. 
Unfortunately, I doubt there are Nostradamuses here.