what is special about reaching platinum level ?

Answer 1

platinum level is special to many people because it shows true dedication to whatever your goal is through terms of coding, contributing to the community and generally very much. platinum users always turn out to be a really great source of information when they do comment and also really talented *_*

Answer 2

I guess it's mostly a mental thing, it's an achievement fun to achieve and show off.
It shows you have put some real time in sololearn and most likely some major impact on its users.

Answer 3

It is currently sites/apps top rank.

It shows they have spent a lot of time on Sololearn.

Answer 4

that satisfying feeling of achievement