What kind of professor would call bitcoin a "scam?" Even if you didn't think it would be successful, what is the scam part? What, Satoshi invented it to scam people? Its an idiotic statement of epic proportions. A scam assumes something is A) controlled by someone B) premeditated and C) can be executed by someone.

Bitcoin is none of these things. Its quite the opposite of all 3 of these things.

If one day bitcoin is worth $0, it was never a scam.