Most of the European Jews who were murdered were low- to middle-class. The so-called Yiddishland was largely composed of dirt-poor farmers, not investors.
Yeah, I know that, I'm particularly interested by the history of shepherd Jews that used to live in the region of Maramures (in present-day North-Western Romania), I think they were one of the only such Jewish communities in the whole of Europe. That's not that much written about them, apart from a few blog-posts like this one: https://frgheorghe.wordpress.com/strabunicul-meu-a-fost-evre... (in Romanian, but the photos are unique), but I find their way of living extraordinary nonetheless. Of course that they were all wiped out in 1944.