I do not agree with this. Intrinsic value is well defined in economics. All economic things, basically, have that kind of value. Money, because it is used in indirect exchange, get additional value, called exchange value. Can something exist that has only exchange value, as contrast to something that has intrinsic value and gradually gets exchange value in addition?
It might be usable as currency/money with just exchange value, but I think that descussion is not even needed for BTc (although of course it makes BTC even more interesting).
Oh, and the most decorated heads in the economical academic world are the most stupid ones. Those professors really can just draw pretty charts on a blackboard, that's all. Janet Yellen's husband got a nobel prize, that should tell you a lot, ha ha...