I find that, if I discuss it over a drink (beer or wine), I enjoy the conversation.
If I'm discussing it at work, I'll send them some links from Steemit to see if that influences them. (@heiditravels usually go over well). If not, I won't bother defending my position against someone who is not willing to listen.
Many years ago, people didn't think the computer would ever be useful for home use. Some people just don't see the potential that's right in front of their eyes.
Isn't that the truth! But in the end they all make the switch.