By the way, I really can't get it how it's possible that in media those two names are frequently mentioned in a way as if they were both VIPs of cryptosphere. How it's possible? How that happened?

Even if you think about PoS.
When you say "Vitalik Buterin, PoS" then you know, that there's going to be talk about Proof of Stake.
When you say "Justin Sun, PoS" - well, entirely different thing comes to mind.