Any currency that grows fast always have a risk. Now, few countries are started accepting it. Might be, we are seeing some sort of tracking will be pushed. It remains to be seen, how well we bitcoiners stand against it.
Due to its design, there is no middle path or negotiation. Either bitcoin gets crushed or it will replace fiat currency. The second option is feasible only when the government doesn't need tax money and doesn't need to monitor money movements. When govt can't track money, they don't know why the payments are being made. Governance fails due to lack of tracking and lack of funds.
In fact there is a middle path, bitcoin coexist with fiat, like what we are seeing now, I do not think it will come the point where there is no fiat, governments will keep printing their useless sheets of paper without any value and people are going to keep falling for that.