I heard a lot of pros keep the RoR as low as 1%-5%. Why not keep a 13.5% RoR?
If losing streak happened, then reduce the bets to keep the 13.5% RoR. If winning streak happened, then increase the bets.
Isn't 13.5 RoR make the bankroll grow faster in the long run?
I think the bankroll would never ruin if it's adjusted after each session.