I consider what you can spend regularly and what you use to determine if your poor or rich.
I remember making my first million ISK, made feel amazing until I realized that destroyers where about a flat 1M. At the time 8M was my total wallet so buying a destroyer was a big investment. Playing it safe, it bought what I could and was still making ISK. I wasn’t exactly wealthy but I could “exist” in EVE.
Now I’m flying 5 different class of ships and have 400M ISK in my wallet and spending 10-30M like its nothing. In my opinion I am rich, but knowing other players having 100B ISK and spending millions like its nothing. But they do that because they are probably in the null sec alliance running a couple citadels, building and distributing a ton of weapons, munition and vessels to the other members.
To the newbean, 10M makes them rich while the old veterans 10M is breakfast.