I dont agree that bitcoin is useless. Bitcoin will never become zero in value. It may have low price for now but I dont think it will reach to the very bottom like zero value. There is no truth to because bitcoin is very valuable.
we dont need to wait for bitcoin to drop zero until we call it useless because the term useless is not based on the price but rather it is based on the purpose or usage of the product . in the case of bitcoin , bitcoin is not uselless because we do already see its purpose and that purpose is to serve the people with fast and easy payments . not only as a payment method but also to give income .