They can't remove Bitcoin, but they can remove exchanges.

Sure you can transfer your money to another currency and use that to purchase Bitcoin, but it'll be a hassle a lot casual users won't want to go through.

Not to mention, it then regulates businesses tax wise and forces them to act illegally and forge documents, which 95% of business will not do just for Bitcoin.

If governments don't want Bitcoin to succeed they can make sure it wont, at least not to a scale where it becomes a global norm.