What will happen if people just stop buying bitcoin? Will bitcoin be as usable as now Or will it be a step towards the end?
How will the market value react to it, people wanting to sell bitcoin but there is no one to buy.
A simple answer to your simple question, zero demand results for a zero value. It will just drastically goes down until it reaches zero. But I doubt that the bitcoin will have zero demand so I think it is impossible to happen.