i see people say to move and wait till he gets tired.
i know everybody has other visions on this, but what kind of fight are we talking about??

is it a sparring sesion with alot of rounds? then it might work.

is it an amateur bout? then it wont work (unless the oppost is in a VERY bad shape and should not box).
cuz of the few rounds you box rounds (and mayb even 2min rounds) you will trow away your fight by waiting.

during a sparring sesion with alot of rounds this could work BUT, don't make this your routine cuz you will do this during a real bout without you even knowing it, and prob lose cuz he wil not run out of gas in a
3x2min or 3x3 min bout. so i would not put this in my training, cuz you will do this in a bout against some 1 who keeps doing combo's on your ass.

so i dont know why you should wait during a fight, but mayb some1 knows :
cuz i see this advise often, and i just cant see the advantage in a 3 round fight (unless your pro and got 15 to go)