I think that cause and effect reinforce each other but I think that social connections and capital are stronger forces.
Following the money is the most popular overarching trend. I know this because I used to not follow the money at all and it was a big financial mistake for me.
I've worked on many trends that were not well capitalized and not given due attention. Especially in open source; there are so many great solutions which are ignored completely. When there is no money, 99% of people leave; the ones that stay are the smartest, most critical-thinking type of people but they're not the kinds of people who can create hype and drive trends towards newsworthy goals because news only cares about money.
I work in cryptocurrency now (after a decade of free open source work) and I can attest that it's not the same kind of people.
A product without capital almost never gets attention. Capital without a product is what 99% of successful ICOs are. To some extent this is also true for many startups too.