I will say it is only when you are playing live games and the games are going on and probably the team you bet on are leading the game so in that case you can't sleep and your betting slip is on the positive side. In that you will be awake to see the outcome of the games to know id your slip will cut or not. But if the games are not all live even though you have won the first games and if the remaining games are in another. You will sleep.
But when you are winning, you would have joy and that joy can make you to hav sleepless night and the same thing to the opposite side of the game. If you are losing you won't sleep as well because it is painful and you would be thinking about it at all second.