5G is just a larger wifi basically, you trade high speed for short distance, it is useful for hot area(populated places, campus, factories, stadiums, etc), but

5G is just a larger wifi basically, you trade high speed for short distance, it is useful for hot area(populated places, campus, factories, stadiums, etc), but it does not make much sense for wide spread locations, for those 4G is enough and much much cheaper with a much cooler radios(and in much less quantities) on cellar towers. IMO, 4G is already an optimized tech considering its price, distance, speed,etc. in the future, it's more likely 4G will still be dominant while 5G can used in those hot zones where 4G speed is not enough(again, the crowed areas as mentioned above).