I think the plan is to let the technology be developed while in the background the big banks and central banks can take those ideas to create their own system. They won't try to bring down cryptos until they have their own network set up. Not that they could bring all of them down, but they'd be able to give them such a bad name it would keep most people from using them. Looks like they won't be ready to bring it down for over a year from now though.