You're using bloclchain generally. Not all blockchains are decentralized or private, it's a technology that can be used and modified in different way, can even get more centralized than the financial system that is used by banks. If you narrow it down to Bitcoin which operates on a decentralized bloclchain, it will definitely survive the attack on pruvxcy through mixers and coinjoin services.

The authorities can only target and hurt Bitcoin indirectly by taking down services that allows privacy, but cannot regulate the Bitcoin network.

- Jay -