No and no, I don't think it's the biggest mystery for bitcoin, but people continue to think of it as a mystery because they really want to know it. Maintaining privacy is not a mystery, but I think the biggest mystery of bitcoin is knowing when this currency was able to dominate world financial transactions and be adopted globally.

Satoshi should take very good care of his privacy, he doesn't need to reveal how many bitcoin he has, how many wallets he has and where he is now. That's the privacy you really have to think about when you have a bank in your hands.