No, it shouldn't be that or nothing. At worse, take a fight to stay busy and angle for a shot at (in this order): Mayweather, Pacquiao, Hatton, or Cotto. :smoke
The only fight that matters now is a Cotto/Mosley title unifaction/re match so we can finally have a True Welterweight champ.
Mayweather is the most interesting fight and the best one to be made. It's truly a legacy defining fight. He needs to call out Mayweather.
I hope he calls it a day. He has just won a fight most people expected him to lose and he did it in style. Why can't any of these greats go out on top, why is it always just one more fight......well 99% of the time anyways.
With potential match-ups against Floyd or the Pac-Hatton winner looming on the horizon, I would like to see Mosley fight on. :smoke