I think that it is not that they are only excited by the rollercoaster ride in value for Bitcoin or they don't want be like their parents, as the article suggests. This age group consists of the most up to date thinking and educated people. They just do what is right nowadays, and others don't do that either because they lack education or because they are stuck in the past and therefore can't comprehend new things.
Its not surprising for millenials on having that kind of mentality which i do see its normal for them to adopt on whats the trend nowadays and wont be stucked on the things in the past.Regarding on their own view im not saying its not good but also not a bad thing to consider. Bitcoin is a good investment but they should think that it do have negative sides too which you cant see it on property investment.
The only thing they should look at is on the risk level, if they can comprehend it then its their choice.