Actually, we can. Whether bitcoin is about to kill the central banks, they won't allow that to happen. And that means that it is really impossible for bitcoin to remove the central banks.
It's one authority that can be removed just because of bitcoin although we know that it can both work together, that's better to assume that it'll work together than thinking that one should be killed just because the other is emerging.
That's better than we have to wait and see that central banks are no longer ignoring bitcoin and they're not going to ban it due to being decentralized. But, they'll be having no problem with it because it is going to help the economy to go up because of the many use that it can be.