Depends on his desire if he wants to retire undefeated then yes it is probably something he should get a move on with.
Now if his main goal is stacking chips (which given his lifestyle should be his main goals if he wants to keep living like that) then he should keep fighting while he can still get as much as he can because those days are not going to last forever and will not come back once they go away.
He clearly has enough left in the tank to beat the better guys in the sport and I don't think he loses to anyone at WW really.
I think he is a bit similar to Bernard Hopkins, if Floyd is going to lose it isn't going to be against a come forward, pressure/brawler too easy to figure out and time mostly. It will be against guys with quick hands and feet who can box like Dawson/Calzaghe and Taylor where even if Floyd figures out the timing and angles he then has to make sure he is quick enough to get out of the way or beat them to the punch.
Floyd is so far from his prime it's actually hard to recognize him. People that aren't true fans that have watched him for years don't notice but I just watched the Hatton fight last week and I can't recognize that Floyd and this one.
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