Anyone can explain me why there is so much hype around this guy??

Many people see him as the next big thing and I would like to know why.

I know that he has many KO/TKO wins, but all his wins are against unknown people. And by the way he has been submitted 2 times, and both times in 30 seconds. And his last defeat was less than 3 years ago, I do not think that in 3 years he has improved his gorund game that much, so it seems that someone with a good BJJ can stop him without too much trouble.

Why many people see him as the next big thing is something I can not understand.