Bitcoin relies upon two sources of unpre­dictability: trans­ac­tions and proof-of-work. Just like nobody can predict what tomor­row’s newspaper will look like, nobody can predict what the next Bitcoin block will look like. You can’t predict what trans­ac­tions are going to be included because you can’t predict what trans­ac­tions are going to be broad­cast in the future. And, more impor­tantly, you can’t predict who will find the solution to the current proof-of-work puzzle and what this solution will be. #bitcoin #pow #hardmoney