If a company’s stock is in free fall, it won’t usually trade that far below its earnings. People wont sell a stock that’s expected to earn them money for much below that amount unless they think the company will collapse before those earnings come back. There is probably a similar point for Bitcoin, where the price actually matches the demand for its utility as a currency. AFAIK it never got that popular for that purpose, so I think the theoretical floor is extremely low. We’re watching it rapidly lose the value driven by demand for speculating on it.