according to Islam all things that are more beneficial than mudorat can be categorized as halal except those that are already prohibited, but if an object more mudorat benefits can be categorized as illegitimate, or if there are differences of opinion can be categorized as chaotic, but for the case of bitcoin Islamic scholars still have differences of opinion, there are those who forbid there are also people who allow, if we as entrepreneurs we take the good side if bitcoin for the means of selling is good, I don't think it's a problem