His real name is Je-Yong Ha, and he might not actually be a billionaire. There's talk that he's trying to become Internet-famous by appearing richer than he is.
But he does seem to have money, because he's got a bunch of pictures and videos on Instagram of himself and Lindsay traveling and partying. Also, he's a MONSTER, and he is indeed a competitive weightlifter and arm wrestler.
He currently lives in Russia, which is where they might have met. A source says there's NOTHING romantic happening here . . . they're just friends. But they do seem to be having a good time.
On a side-note, he posted one interesting video, along with some pictures, from Mykonos, Greece. Apparently, a little girl came up begging, and he tried to give her money. But Lindsay snatched it away!
No, Lindsay wasn't being greedy. She explained to him that kids over there are USED as beggars, and she didn't want to support that system.