You pretty much did what one can do: Introduce the concepts, provide a hands-on/visual experience, and debated whatever came-up. I don’t know if you omitted the negative aspects by association from the beginning, or tried to refute them when they brought them up, but they should be part of the introduction, with all the counterarguments that one deems necessary.

Aside from that, it’s down to each one to take it on from there with no pressure, make their own decisions, at their own pace, and take responsibility for themselves. I can still see many people around me I would never suggest getting into Bitcoin, neither from a usability point of view, nor an investment one (them being very conservative with their savings, and technologically subpar). You can assist them, but not decide for them.