>:(
Why are you mad. You can turn matter into energy with nuclear fusion and fission. The tech has existed in-rp for about a century and a half, maybe more.
And about Gravitanium, it only captures particles from fermionic matter that are charged, and independent, or loosely attached to an atom. Alkali metals, for instance, are often ionized upon contact at the surface level as Gravitanium steals the extra electron. There are other effects that Gravitanium can have with Gravatic magnets as well, but that's a whole different discussion.