You can tell me anything what's bitcoin worst enemy is...
Mine is, government!
Bankers are the real threat, bitcoin in itself is not a threat to any government, the threat of bitcoin is against banks and their interests, so it makes sense they are the ones that are going to make the greatest efforts to stop bitcoin, they have tried to stop bitcoin adoption by canceling the accounts of some exchanges but it seems they are going to use their greatest puppets, the media and governments.
I think the bitcoin opponent is not from the bank, because the bank has no authority whatsoever to ban bitcoin, I think bitcoin poses a threat to the government of course because the decentralization and anonymous of bitcoin make the government afraid when all the people in their country use bitcoin, actually who want to stop bitcoin development is government #imo