Move on or fight?

So I´ve been wondering, for no particular reason..i guess. You know how some people are just at the right place at the right time? How they manage to turn a small idea into a fortune? Or maybe even their action?Unlike others who work just as hard (if not harder) and never get anywhere... Maybe love works the same way, maybe some are destined to be with the person their were meant for...and some just keep searching or settle for what they can/did get. I mean who knows why life has such an ironic sense of humor, even cruel at times?! Do we accept this and move on and just play the cards we were dealt? Or we go to the mattresses?! In other words we fight until we get it right?!