I'm confused by your title saying that Bitcoin could reach $1 million. Is that possible?
But you said that the price won't drop to zero in just one day. That's ridiculous if anyone believes that, because as demand for Bitcoin increases, the price won't get that low.
The government will only handle regulations that can be monitored, while the security of stopping Bitcoin will never be possible.
Not literally 0 but it could be, I think for 2 main reason: 1. If big companies buy like 90% and dump or "centralize" it.
2. If quantum computer can literally break the blockchain hash, how could bitcoin defend against that?