John Cena is a 16x World Champion. A future Hall of Famer.
And the most-popular WWE Superstar of All-Time.
Cena's WWE career did a 360 when he debuted his Dr. of Thuganomics persona and started rapping as part of his gimmick.
"He is the better version of what I did. He's really, really spectacular." - John Cena on Max Caster's freestyles
Coming from a mainstream celebrity like Cena, this is high praise, and Caster is aware of it.