To be honest, I don't really get the question.

Do you assume there should be some single big guy who creates the social spaces?

Sorry, it was a loaded question. I was more asking who's working on the foundation for this next phase of the internet. Who's working on decentralized reputational/vouch systems? Who's working on zero-trust proof-of-authorship or proof-of-being? Who's working on privacy-focused proof-of-identity? etc.

"Who" is also plural in English.