Maybe yes Maybe no. Ofc Bulgarians people has mainly low income, but in Hungary it's not too too much higher. And 0 problem to cash in / out almost any amount (7figures+). I dont think it's linked with the︀ country itself (poor or rich). It's more related about the banks itself, verification, what they︁ accept or not, if local currenty (leva, hungarian forint?) or in Euros / USD.. and︂ ofc your links with the bank.
Central Europe is globally still very lax with this︃ topic. Probably much more than western or richest countries. I don't have experiences with all︄ banks, but I can say in HU and SK, very lax. I don't know well︅ Bulgaria (just went few times, but no business or banking either). Just curious about if︆ someone has a similar experience there.