Bitcoin is too broad and touches too many topics. I think your poll should be more specific. Level of expertise in what topic regarding bitcoin? Tools and products in the space? How to use it? Core development? On chain? Lightning? Economics? Social aspects? Philosophy? Etc etc. You probably get what I mean.

That said, I voted advance beginner for myself. Bitcoin is so broad and each topic can go so deep that the more I learn about it, the more ignorant I feel…