- 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.
I think in the same way, even if a bitcoin in gift even if small it is a better investment of that money than most gifts that we could give, it is a mistake to do so when we are supposedly thinking about them and what it would make them happy, unless of course they were like us and they were interested by a high degree in this market, but if that is no the case then it is better to give them something else that matches their interests and not our own.