re: All good points
The problem with building skyscrapers really, really high is not wind loads. The problem is making the foundation wide enough to prevent it from sinking into the Earth. Wind loads would not add to this problem. Therefore a concrete structure with guy wires should be sufficient. It merely has to be designed to handle the static loads. It's a trivial problem, a first year engineering student could do it. The only complexity is preventing buckling. I won't bother to do it because, well, what's in it for me?