The value of bitcoin is an interesting problem , in a sense it has uses , but 1 bitcoin worth 4000$ why not 4 million , or nothing? because there are only so many bitcoins, but what if you had started with 10 times the "number" of bitcoins , would they be worth a 10th ?because in a sense you could trade a tenth maybe the actual number is psychological , or is it , could it be available demand for the premier crypto currency ( i don't know say a trillion /by number of bitcoins.
So yes in a way the value of bitcoin, is amount of money in the world that will use need want the first crypto / number of said crypto ( bitcoin in this case) , halve number of bitcoins double it's price ( allowing for tiny technical anomalies ). So yes bitcoin has a value due to it has x amount of demand , ( x/number of bitcoins=price , like the guy said many things have little or no inherent value accept demand , but that very demand has a value, Gold is an excellent example , little inherent value but where do people put money in troubled times.... GOLD and now probably bitcoin. It's easy to see it's uses , there must be billions in this world that do and will find it usefull . The key is there are only a finite number of bitcoins,it's in a sense a usefull service which you pay for on a sliding scale, divided between you and fellow uses and the fixed finite number that bitcoin started with , that's why they are worth money. The worry would be better competitors , but once established as the "one" very hard to knock it off perch ( like gold) . Now where do I buy some?