Before, we used to say this: "we're in it for the tech, for blockchain technology". Nowadays, I don't think that most people who are getting into Bitcoin will say the same thing. It's mostly about it being a store of value, an asset, an investment because of the value of it keeps on growing.
If we will just be direct about it, it's simply about the value that it has got, the money.
If only we can be honest with ourselves, this answer Op question perfectly. The era that people see bitcoin or into bitcoin because of its technological and blockchain improvements is long gone. Our youth who are mostly in the age bracket mentioned in the post shared by Op are into bitcoin purely because of monetary value and not primarily because they want to contribute to blockchain development. The privacy protection that bitcoin comes with make it more pleasant to them. The younger generations focus more on money and will partake in anything that brings more money and Bitcoin is an example of such thou with significant risk involved but who cares?