Go all in on regret later. You are on a privileged position to profit from high risk high reward moves. No risk no win, and BTC is the best long term high risk bet.
It could be a good approach to start planning on making an investment with bitcoin for the young ages while they are still living and being financed by their parents especially the teenagers but for sure these people would be more interested to save most of their money for their extravagance such as gadgets, clothes etc. And although your suggestion has some point and could bring a good result to them but going all in is not necessary for them I guess because they are still young and they still need to understand many things .