I would be like villain T-1000 in terminator 2 walking through the school corridors. I already fcuked all the girls in school, i don't need to be a champ to do that.
Hit the interview circuit, become a media darling, and try to cash as many endorsement opportunities as humanly possible to ensure myself some money to fall back on in case my prime as a fighter completely vanishes overnight/I get knocked off and lose the belt quickly.