Great to share some quality time with your brother (and family in general). With your talk about crypto and him about investments, the only way is to get down and dirty and the best compliment to that is with a stack of ribs!
We put "value" of a crypto currency in terms of USD, which is what attracts people, but the real value is in its knowledge, technology and use.
It's an interesting comment about ICOs and there is a real problem there. There are ICOs happening left, right and center! Which ones are a) actually real and b) is different from the rest and worth investing in. There's a lot of future potential as you say, but equally a lot where investors get burnt. Stay real, due your research and due diligence. You can't crack all the good eggs, but prevent yourself from getting the bad ones.