BTW in my life experience, I have learnt that NOT the best technology always wins (that's unfortunate but...); most of the time it is the technology with the best user experience and the best marketing that wins; it happened to me in the past many times, also in my job experience. I hope Bitcoin will conquer the world but right now it is very far from being user-friendly, much work has to be done for users in my opinion. I read your articles, they are excellent and I am still learning. But until Bitcoin is only for Bitcoin gurus and Bitcoin guys, it will lose a big opportunity. What do you think of Ledger and hardware wallets in general for Bitcoin? I am trying to move my few Bitcoin to Ledger but I find it difficult. Thank you