Re: And another confusing point
Squash it enough*, say inside some kind of exotic high-strain metamaterial, and the theory is it should become superconducting a room temperature.
Such a material is metastable at best, and likely to undergo highly explosive RUD with the slightest defect in the containment material. This has been shown with the diamond anvil experiments. Stable under the vast anvil pressure, but relax the pressure and boom.
* For some vast, currently unachievable value of "enough". Think a lithium-ion battery or hand grenade is explosive? IThey'd be like firing a cap gun in comparison. The strain energy stored in the containment metamaterial would be many orders of magnitude greater, not to mention the compression energy stored in the metallic hydrogen.