Yes, I agree that the only thing a government can do is to regulate Bitcoin.Because crypto is designed as decentralized.Thus, a government cannot take full control in it.Through regulations, the government can also benefit from crypto through taxes and regulating ICO would minimize scam incidents.
Even if bitcoin or cryptocurrencies in general are regulated, still scams, frauds, money laundering and other illegal activities will take place. There’s no way to stop that as the whole system is decentralized. Although, by regulating ICOs are by making them register under a specified law section many scams and frauds can be avoided.
Implementing fixed set of rules to the exchanges will surely help the government keep some kind of track on the moving money between fiat currencies and crypto assets and also help charge taxes and limit the people from trying to launder their money through these digital assets.