Is a super skyscraper good or not?

To think about living in the 100th floor is amazed enough, but I never think about live in a super skyscraper that has over 300 stories. This is unbelievable and sounds impossible. However, to have this kind of building in a city is not a good idea after all. Think about the cost of this. Who can spend billions dollars for this and who is willing to pay for an apartment in this. It's possible that you have to pay nearly a million for a room. I can't deny that it helps solve the population explosion in some cities but such a big structure, is it safe? It's a complex design for sure and what can happen to people inside if there is a fire? Or if there is an earth quake and that super skyscraper collapse, then not only people inside are "finished", but also people from the out side. After that we have to spend money to clean the mess. Besides, it consumes too many materials. Moreover, our technology isn't developed enough to construct such a magnificent building like this. Generally, even we want to live in a place like this but having this type of building is so far from reality. "The bigger they are, the harder they fall", and noone can predict what may happen to a building which is twice tall the tallest building today.