What about power generation on Earth?
Yep, all the power we’d ever need — at least while we’re still a Type 0 civilization.
Well, One, lets hope they can find something other than gold to turn into anti-matter. And two, how are you going to capture and store it. Last I heard, you needed some sort of magnetic containment to keep it all from smashing into matter and obliterating both. And that would require lots of power. And that doesn't count the power used for making the stuff.
Warp drive? Not any time soon.
That would never work. We are going to need all the gold to satisfy the gold bugs desire to return to the barter community of hard currency. If we use the gold to generate anti-matter and keep warm, the goldbugs will go insane.