Every demand curve must eventually hit the quantity axis because with limited incomes, there is always a price so high that there is no demand for the good. do you agree or disagree? why?

I disagree. Draw the curve. So as to hit the amount hub, the cost would need to be zero. This is really incomprehensible on the grounds that it would happen at limitlessness and assets are constrained. The appropriate response in any case, is that with value high, the bend tries to hit the value pivot at amount zero not the amount hub.