The state has not yet achieved authority over this sector and the market share is increasing if we consider a long timeline. It just means that the states are banned based on the regulations they set, but are unable to prevent the use and operations. As more CEOs, influential people are diving into the cryptocurrency segment, the government will have a tough time regulating cryptocurrencies for real. They can impose taxes, that's fair but they can never ban crypto.

However, if something really grievous like a 51% attack occurs, I'm wondering if it's still possible for the governments to develop USB wallets that extract all the crypto from the blockchain ledger. They could then make a really crafty move- issue out real Bitcoins with all the data in the personal USB drives of all the investors, and make use of anti-counterfeiting technology to make it legit and circulate coins like fiat currency. This way, they have the whole situation under control.

Possibly, the government could be trying out ways to exploit the blockchain and get this done. Just my thoughts over a cup of strong coffee, I pay my bills =]