When miners do not mine but people still keep on buying that means price is still not 0. Price technically could never be zero because I am willing to pay 21 million dollars to buy 21 million coins (or 1$ for whatever amount we have at that moment) which makes it MINIMUM 1$. Just this example alone proves you are wrong, something as simple as this proving you wrong requires no other answer but lets move on anyway. 2 is okay, not a problem so why you mentioned it I have no idea. 3 is wrong, why not?

It is more than enough, who are you to judge their income being enough or not for them? 4 suddenly collapses because 3 did. 5 is just assumption and not scientific. 6 again assumption, not scientific. 7 same. 8 based on previous assumptions. 9 same. So as you can see none of this is scientific, you probably have zero idea what the word scientific means.