Very nice work! I think that Satoshi opened a new era in the age of economics and computer science (to say the least), and with bitcoin many problems are solved as well (the centralization problem, the double spending problem).

I am still very new into the cryptocurrency world (I only started to know about it a few months ago) and I am trying to educate myself as much as possible. I have a question. What challenges do you think that bitcoin has to solve in other to improve the velocity of its currency? By saying velocity I simply mean the rate at which the currency is circulating in the global economy.