Well of course it has a negative and positive impact. But I don't think governments can implement regulations on Bitcoin, I think they can only regulate exchanges as Bitcoin is using blockchain technology which is decentralized. If Bitcoin or cryptocurrency exchanges is regulated therefore tax is automatically included in every transactions. Tax is not that bad since we can contribute to the government for whatever they want to use it for the country. Regulations in Bitcoin can expose anyone who are going to withdraw their coins on exchanges due to the AML/KYC policy implementation by central banks. Once exchanges are regulated our funds are safe and is the sign of acceptance or legal stance by governments.