I am conceding both points. That BTC can reach 10 M and that the government is incompetent. Just not infinitely.
Most importantly, they don't need to be 100% competent in banning BTC to prevent it from doing all the things we expect it to do in terms of replacing parts of the current financial system.
The amount of capital required for BTC to reach 10 M (in current PPV) can only be mobilized by nation states and their associated banking and financial crony systems.