That would be one mighty 'cage'. It would need a bit of steel I think!
In seriousness, the amount of energy bouncing around in space is unfathomable. If we could harness at least 1% of it and transfer it back to earth, our energy woes would be gone.
I always enjoy reading your futuristic views and opinions.
Thank you sir, I enjoy writing them as well and glad you are enjoying.
Yeah the materials required would have to be rather strong, but given just how far into the future this would be we might have access to super-materials strong enough? who knows! <3