85% of all Bitcoins will have already be mined by the time of the halving. How do you think Bitcoins 2020 halving will affect its price?
Of course it will affect the price. Miners will have less bitcoin to sell, so by the economic law of supply and demand, it will in theory, increase the price. As the supply is now lower
that depends weather the world will still care as much about bitcoin as before, you are doing an assumption of constant significance.