ПЕНКИ И ЗЛАТКИ СЕ НАРОИХА
"Много пенки и много златки се нароиха в България."
I found the above sentence in an interview in Новинар about the Bulgarian national character: "Проф. Николай Данчев: Страданието е генетично заложено у българина". The sentence is impossible for me to understand because, unusually, it contains three words that are not in any of my dictionaries: пенка, златка, and нароя. A "златка" appears to be a marten, a little forest animal, but that's as far as I was able to get in deciphering the sentence. What does Prof. Danchev mean?