It was never worth any of those figures, the drop proves this. I doubt it's even worth even $2 mil atm.
Possibly. However that still doesn't detract from the fact that value is 99% perception and 1% fact.
Gold is worthless too. You can't eat it, you can't us it to build virtually anything. But people perceive it to be valuable so it is.
Helium is actually valuable, there's even a tighter supply of Helium than Gold in relative terms. A kids helium birthday balloon should be worth at least 200 dollars. But it's not perceived as such, so it's not.
Gah more fallacy heaped upon fallacy!
Gold is not worthless. Just because it's not for eating, nor for building things, doesn't mean it's worthless. It is attractive to people in ornamentation and that is where its original value comes from. On top of that, it is used as a money because its properties make it very effective for this specific purpose. Gold's value as money is not arbitrary... in fact it is almost inevitable given the geographic makeup of the Earth and the properties inherent in the gold element.
So people did not just "decide" that gold had value - it has value because of its
usefulness and its
properties. The same goes for Bitcoin - it has value because of its usefulness and properties as an international frictionless payment system. Specifically with Bitcoin, it is the protocol which has use value, and the Bitcoin units have market price because their supply is scarce and they are the only units usable with the Bitcoin protocol.
If you really want to claim that helium is more valuable than gold, because it's more useful, then you've lost your final credibility as an economic thinker

. Gold's primary value is in its
effectiveness as money - this is an elementary concept. Money, as a "good," is far more useful than helium, and thus gold (being useful as money) is correctly priced above helium in the marketplace. The demand for money FAR outweighs the demand for birthday baloons (and whatever else helium is used for), so even if helium is more scarce it will still command a lower price than gold.