The value of bitcoin, as with other currencies, is the value people believe it holds. More concretely, this would be the value of goods or services you can exchange it for today, and/or the future value you believe the currency will hold.
Your argument reminds me of a classic eBay seller problem: you can price your rare collectables however you want, but if no one is buying, they are worthless
Your argument reminds me of a classic eBay seller problem: you can price your rare collectables however you want, but if no one is buying, they are worthless