Well that isn't the point. It's about moving up faster. I am ready to lose 17BI and I am going to deposit again in that case. I just don't want to grind it from NL2, when NL5 and NL10 is not so much tougher. The bankroll amount is just a number at this moment. I am aware of the variance. I might deposit a few more times, but I might not.
Theoretically speaking, if I have winrate on NL5 same as on NL2, so according to utility, it's more worth to play NL5.
My story is going to have a happy end.
Thanks for feedback and GL at the tables