As a noble gas, helium can't be synthesized, so its cost is because of its scarcity— and because it's a small molecule (like hydrogen), you inevitably lose some

As a noble gas, helium can't be synthesized, so its cost is because of its scarcity— and because it's a small molecule (like hydrogen), you inevitably lose some and require continuous top-ups. None of this sounds like it would be realistic at scale, no matter the amount of money in play.