They will (as they have always done) pull the rug, create chaos and destabilize the currency. So, they can come as rescuers and saviors of the market with their privately owned Central Bank Currency.
They will use the exact same playbook in crypto and this time it will be much easier because of all the leverage. Beware of who you are listening to, are they paid or sponsored? In the end you are the master of your decisions, not the herd, not the Banksters.