I feel bet increases should grow naturally when your bankroll itself has grown.
Let me get you correctly did you mean your bankroll will just start growing upon itself when you can't even make any wining? Or did you mean you will continue making deposit in order to build a large bankroll? If that's what you mean I think is not a good idea, and going about it this way won't make you a responsible gambler.
It seems to me that you don't know how a bankroll works, otherwise you wouldn't ask that question. A well-managed bankroll eliminates the risk of going broke. For skill games, managing it well is an essential component of making money. So, Grace333 is right because when your bankroll increases, you can increase your bets while maintaining the same, minimum risk of going broke. That way, you reach a level where you stabilize and can make cashouts.