I mentioned Bitcoin to someone I work with, someone I really respect. And they were like... "but what happens when the central computer gets hacked" "what happens when the government shuts it down" "someone could just make more"

They wouldn't have been responsive to anything I said. And there are lots of people like this.

On a positive note, another person I spoke with recently... he was open to it. Was genuinely curious. Didn't know anything about it, and didn't have a computer-background but at least wasn't outright dismissive. I would like to think that eventually these people are the future.