Replace those "bitcoin" words with "gold" and turn it back to them
To be honest, all the professors I knew in my economy department are just not able to understand it.
The real problem behind the scene is: When they hear the word "money", they become panic and lost most of their ability to think, they start to seek some powerful forces that back it, without that force, they feel extremely insecure about its value
Unlike Bitcoin gold is used in jewelry and has industrial application as well
Besides that, nothing substantial would actually change much then, save maybe for gold being also used by some hard-wired goldbugs as a store of value (with varying degrees of success) and for speculation purposes indeed. The first two points would remain absolutely valid if we substituted gold for Bitcoin...