At the same time people who have diseases which actually require medicines that rely on similar component ingredients are unable to get them.

That's one of the biggest issues with talking up miracle cures. Since it's not been proven, no one is gonna actually put their money behind drastically increasing production (pharma companies, etc. are not gonna put tens of millions of dollars on manufacturing a hunch), but the run on the existing supply means that a lot of people who actually benefited from it (for whom that existing supply was intended) now dont have access to it.

It's a complete lose lose. Even the hoarders don't benefit if it turns out to be beneficial because if it does turn out to be beneficial, production will be ramped up extremely quickly (since it's a known product and process with know side effects, etc...)