It's not hypothetical because it happens. Stocks don't operate in low-entropy hypothetical planes of existence, they trade on markets. If your ask has no bids y

It's not hypothetical because it happens. Stocks don't operate in low-entropy hypothetical planes of existence, they trade on markets. If your ask has no bids you lower your ask. Sellers will keep lowering it and if there's no bids it will get very near zero in which case the exchange will likely de-list the stock. A hypothetical where you sell one flying car doesn't illustrate a comparable dynamic.