Saying that no one can use Bitcoin for needs fulfillment, like car is used for driving, dollar for settling loan debt, gold for making jewelry or software for editing text, is nor my point of view, but fact. No human being on Earth can use Bitcoin in that way. No human need can be fulfilled with number associated with someone's Bitcoin address. That is why when you buy Bitcoin you can sell it to 'greater fool' only, and not to an actual user who will practically utilize it for needs fulfillment. Besides Bitcoin and crypto, the only instances where one can make profit only via 'greater fool' are fraudulent investment schemes.