and also this will bring DK Yoo into mainstream as he will be backed by the popularity of manny.
It won't gonna happen again because the guy had already reached his limit to fight a real boxer in the ring and I'm sure Manny already felt some lack of strength and speed due to his old age. He only can afford to fight the like of DK Yoo right now and maintain his popularity with these exhibition matches. It's not that bad because I'm sure in the future, if he won't take this fight right now, he will be ask to fight in the future.
As far as I know DK Yoo is already a popular figure in South Korean as evident of him being a youtube influencer and that is the main reason why Manny chooses him in the first place. So both of them will benefit in this fight, as the saying goes, it takes two to tango.
As for the belt, obviously, there is no title on the line, everything is for pure fun and entertainment. Manny is the pro boxer here and could win in this fight.