Technically, I really don’t see any, but fundamentally, I think they are the enemies around, the financial institutions, the banks and the government, as these are the people that bitcoin is really against for now, although not completely against them, but not okay with the financial services that they render to most of their people.

We have some governments that would do everything possible to actually make bitcoin to be less used, presently now, there is nothing that they can do again in the aspect of cryptocurrency, and they know they cannot generally control it, so the only way which some of them has been doing is to create their own national currency, and even with their national currency, there is still little chance of people using it because it is a centralized currency unlike bitcoin which a decentralized one.