Hey!
As far as I know, it's the current familial status. You can mention their former wealth in their background story if you'd like to. I have a "well off" family but they're not necessarily considered "rich" so I didn't apply for that status.
... But yeah. If they're no longer rich, that would be a part of the background information and not the actual status you write down.
If I'm wrong, an admin can correct me.
Ashton