your doing it wrong OP. focus on learning and not moving up. the stakes are all very very similar until the 100s. it doesnt get "tough" until the 20s imo, then u will have to learn some new things, then the 50s are fairly easy to conquer after that. the 80s are the same as the 50s but not quite the 100s, and then the 100s might take a while (for some reason i had a stigma about playing $100 a game when i got to this level). at the 200s u will have to play me (sadly nobody else ****ing sits newbies coming to this level which tilts the **** out of me. apparently except for IT2WU who will sit his old students
), and thats where the real fun begins
Soooooo ya, to answer your question, move up when u feel comfortable. I was a br nit back in the day, and focused more on learning the game. Then when i thought i was ready i flew through the stakes using a 20 BI rule and moved up as fast as possible. I srsly recomend this because you will see less fluctuations in your br as you are learning the game, as compared to moving up as soon as you have xx ammount of bIs. It is very disheartening to move up when ur at 20 BIs, and then moving back down because u just werent ready and lost it all.