I find that most important thing is establishing that you (the “bitcoin teacher”) don’t care if they ever buy bitcoin. Rather, you’re just trying to explain why Bitcoin is important socio-politically.
Most people only ever hear about Bitcoin because of its “price”. The scammy nature of “crypto” broadly, and the volatility of Bitcoin make people wary, and rightly so.
But if you can get them to see that it’s a force for good, you’ve planted the seed