Yamcha seems to be the butt of everyone's joke in the dragonball world. Even I don't like him much, I guess we still need him for
half time entertainment
But however we can't really rule him out just yet because if we base his potential on that then we have to say
Superman can't beat doomsday
I would like Yamcha to get stronger (use the dragonball for the love of god stop being irrelevant) because he needs a miracle