How many exalts do you have to have to be considered middle-class? And how many do you need to be considered rich?
Why would you want to know? "Wealth" is pointless unless you need it for specific things.
Anyways, that's how I'd range "wealth tiers":
Disclaimer: total "wealth" here is the
total amount of
all currency you accumulated during your typical temp league, regardless of time played. A lot of people actually can't appraise their own wealth for shit.
1) Poorfag/casual/noob - less than 10 ex - these people don't play much, they don't play far (barely into maps, if even), and they pley either "beginner-friendly" or homebrew builds. 5-links, "vendor trash" uniques, cheap rares. Still, more than enough to get a good feel for the game and have fun.
2) Lower middle class/plebs - 10-50 ex - Mathil fanboys and/or more or less competent but not knowledgeable people, play moderate-high amount of time, but aren't very good at it. Cheap-ish 6-links or expensive 5-link endgame uniques, can do either one fully-geared "endgame" build or a couple of mid-tier builds per league, or more if they resell gear once done with a build. Play into endgame, but not too far, or not for too long.
3) Upper middle-class/hardcore crowd - 50-150 ex - know their shit about the game, know the market, are into active trading/farming/crafting/flipping as ways to generate currency, but nothing exceptional (no market manipulation, just go with the flow or exploit minor market trends). Can either afford one uber-optimised (but not mirror-grade) endgame farming build or a few highly-optimised but still relatively inexpensive endgame builds. Play a lot, but tend to call themselves "casual" on Reddit (lol).
4) Rich fuckers - 150+++ ex (usually 500 ex+, because once you go rich, it's really easy to scale that wealth upwards if you want to) - these are people who really know how the markets in PoE work, AND they know how to make the markets work for them. Top players, streamers, professional big-time crafters and traders/flippers. Usually part of or closely associated with certain big-time guilds. PoE as a full-time commitment. These are the people who go super-fast, get there first, roll in $$$ from selling access to where they got first, then while the rest of the playerbase catches up, they start doing another thing first to make even more $$$, while simultaneously reinvesting $$$ they made into item/currency flipping or some good shit crafting.
Personally, I'm 3, with total wealth depending on how much I'm interested in the game at the time.