I do not think that's the religious issue you have. I have to say that all the bitcoins and religious gophers are gopher, people work hard and they offer money on it. Bitcoin does not need any specific religious approval to function as money. Religion supposes to solve a spiritual part of human life that does not decide which sound is considered money. Surely bitcoin is considered pre-Islamic but it is digital money. haram or not depends on how we get it.