Actually, thinking more about this, even if people are genuinely expounding on their assets, and doing so in a forum where wealth is the bonding factor, I don’t see that being any different than what people do on and forum of mutual interest. For example, here if we ask what bike(s) do you own, the answers are almost always descriptive of the brands, makes and components. And quantities. We even post pictures. And answer could be as simple as, “I have a road bike and a mountain bike.” But that isn’t what we say nor is it what we expect from each other. Some want to impress others. Some to hear all the technical details. Some want to know where they ‘fit’ in the cycling ‘hierarchy’, etc... We all somewhat define ourselves by the things we do or invest time, effort and money in. And most will put their best foot forward in groups.
If wealth is your thing, then that’s what you’ll brag about. So, I’d not be surprised that folks would do so in a platform where that is the common denominator.