You simply do not "crack down" on Bitcoin.

It's about time financial institutions and their sockpuppets (the Governments) grow up some balls and officially outlaw Bitcoin, so they can face the harsh reality: Bitcoin is resilient to bans and regulation by design.

Anyhow I think they know it, so they won't make us the favour to ban Bitcoin - they know they would have lost the battle from the very beginning, so they will try to play their cards in a different way.