All in? HELL NO, nobody should go all in, regardless of age. Taking higher risks when younger--that's all well and good. But going all-in on anything crypto is a recipe for bankruptcy. I wouldn't even allocate 20% to crypto. You'd have to be crazy to go even half-in, and I say that as a person who likes bitcoin. A lot. It's just way too risky.
Provoking young people to focus on bitcoin I think won't be an effective thing to do. There are more important things to be prioritized first rather than bitcoin. Young people should focus more on their studies to get a good and stable job someday.