The impact of this Millennial in crypto currency is really great. The future of bitcoin is in the hands of Millennials who in turn will pass it on to the next generations.
I think that the impact of millennials is still not understood fully.
Millennials see internet as something normal. They understand the technology better than their parents. And well, they are the future.
While many thought that the previous generations should be attracted into Bitcoin, since some of them have much more money for example, those will still prefer gold and stocks. They don't understand this Bitcoin thing. They (still!) have a better chance to see it as a threat than as something beneficial.
And here the millennials come in: they can help the older ones from around them (families, friends, co-workers, their managers) understand what's this all about.
They have the potential to get everybody aboard.That's much more than only investing themselves... So yes, the best is focusing on Millennials.