Bitcoin value demand on people demand, but i called it people money demand, because the true value of bitcoin is also depending on the interest of the people that invest money in it, if the interest of the people is increasing then bitcoin value is also increasing, why is because if people only register bitcoin account and they didn't buy bitcoin to the wallet you know nothing will happen until they buy bitcoin to it, so bitcoin is here to attack paper money and people will store all their money to bitcoin. People interest money is value of bitcoin.