You are a troll, and a stupid one at that. Who ever said $1k was a big enough bankroll for $2/$4 let alone a higher limit? The biggest difference between 2/4 and 5/10 is the swings will be 2.5x as large, and probably more than that because the players are better overall.

If the question is "I have $10k and have read several poker books, would it be more profitable to play 10/20 than 1/2?" then the answer is yes. Obviously. But most players don't start with that kind of scratch, and the better players at the higher limit will eat them alive much quicker than the low limit's slightly larger rake. You simply don't get as many people coldcalling and limping with terrible hands to make up for the rake reduction.