Nothing happens op because first of all . The decline has a limitation . It can't just decline forever but declines can be a good and bad depending on the persons view .
That is an optimistic point of view that the price wont decline to a certain point but consider one thing, anything that has a valuation need to have a real world application to have an valuation and if that is not fulfilled then the market will drop down to zero and i doubt whether it can survive the next ten years because of the use case situation.