
Resolves YES if the following is satisfied:
- A tether from earth to a counterweight beyond geostationary orbit 
- Vehicles with capacity to lift over 1,000kg payload to geostationary orbit (presumably bigger but let's make it easy) by traversing the tether 
- One successful deployment of such a vehicle and payload 
There was talk about doing this by 2050 (China, Japan), but I suspect that was a little overly optimistic. Other markets on manifold predict a start date (at time of writing) of 2069.
Note that the above conditions could be satisfied during construction - e.g. the first payload could be part of a geostationary platform that comprises part of the overall system.
If this is too soon for you, I've made another market with a longer timeline: https://manifold.markets/Tomoffer/will-we-have-a-terrestrial-space-el-920d2bf3bb3c?r=VG9tb2ZmZXI
@RutgerDeMaeyer the base rate for discovery of such materials is pretty low though, I'd say.
@Tomoffer yes but also it is practically impossible to build, even using carbon nanotubes. So sci fi. I have higher hopes for an asteroid colony.