To answer the question, I'll ask a question. What is Bitcoin? A movement of liberalization/freedom. Right? Which is the biggest country being proponent of libertarian/freedom thoughts? Which country has history of experimentation with disease called freedom?
You have my answer for origination of Bitcoin.
I know, you didn't ask me this irrelevant question because you're fan of Bitcoin. Then also, I'll give you reason behind its origination within few days. I'm struggling with economies and almost there.