Why its so much blockchain projects devoted to 3D,AR, Virtual reality?? Its not obvious how does these fields connected with blockchain..

Actually, the real value backing the bitcoin is the same as one for a gold. Its a scarecity of it. If it would no difficulties to mine everywhere some amount of gold, its value would be equal regular sand... Only scarecity of asset makes its value

Actually its not an online taxi, but as announced a "taxi for your car" - a tow-truck order sevrice. Actually, the services for a cars are a quite necessary, in regard amount of cars in the world.
An it seems its altcoins backed with real facilities an payments for it