The point is to get to a level where you can make enough money for yourself - if you're aim is to be a professional poker player - although everybody has their own definition of "enough money". Getting that money doesn't always means that you have to play on the highest limits you possibly can, it's about maximizing profit . Like nanonoko, he's playing 24 tables comfortably and probably getting more money from rakeback than he'd get by winnings on higher limits, playing less tables.
Since I suspect you can't make enough money by grinding the 1$ buyin 40mans to make a living, I don't see any point in not moving up - except of course if you don't have the necessary roll to do that.
Originally posted by KozakFB
no way to improve my game anymore
It's really not a smart thing to think.
Originally posted by KozakFB
I know I can crush these games easily..
If that's true, than I'm sure you'll be successful on the next limit as well, so why not make more money?
One more thing. If you doesn't really care about moving up in limits, than you probably got bored of the game you're playing and if that's the case I think you should try other poker formats/variants.
Good luck!