- Send them affordable Bitcoin on their birthday.
Give them bitcoin as a gift, but not on birthdays and valentines days and Christmas and stuff. A gift(especially for these special days I've mentioned) are mostly something to make them happy; not an opportunity for you to shove down your interests to them regardless if you have good intentions.
If you are frequently giving bitcoin in every occasion, looks like you're earning just to please them or make them happy, and certainly not a good mindset for a smart investor. At the end of the day, you'll end up being broken. However, i understand OP that the goal is to create faster adoption of bitcoin. But this can done in other ways, by not being so generous in bitcoin giving because as what you said, only bitcoin appreciates its value for now, the rest are totally depreciating.