Very good. The explanations are clear and P. Noizat knows whereof he speaks: he is the co-founder of Paymium. In fact, there is only one thing I do not understand: Why Amazon will not accept Bitcoin and continues to waste time with useless trivia (Amazon corners ...). If companies like Microsoft, Dell, Rakuten, Paypal (soon) accept Bitcoin is no accident ... these are companies that have experienced the Bitcoin and realize tremendous opportunities for a way to universal, portable payment almost instantly on the Internet ...