Government doesn't really care about BTC
The United States government really does care about BTC and has a strong interest in killing it, because BTC enables international money transfers outside the banking network. The United States government enjoys de facto control over the interbank network, which it uses to bully countries which it doesn't like (for example, you can't transfer money to a bank in Iran). It is therefore entirely plausible that the current DDOS attack on BTC is mounted by agencies of the US government. It has the motive, it has the means. In the absence of evidence about the identity of the attacker, the US government is the #1 suspect.