So you set your increase on loss as well as multiplier pretty high, and start small, the bare minimum. Given fast enough autobet, you wait for an outlier which will come sooner or later and bring you dough, like a couple percent at once. Then you increase your safety margin. Indeed, you may still bust but you must be extremely unlucky to end like that
I'm starting to understand your point, but still it's hard without real examples. I mean, the bankroll, the initial bet, the increase on loss, what are they? What do you mean by being "extremely unlucky", 10 losses in a row with 50% win chance, or 20 losses in a row? Because both cases can be called extremely unlucky ones, but there is a huge difference between them. I personally encountered 16 losses/wins in a row, so I know it's possible, but I would call 20 losses in a row with 50% win chance a really unlikely event (it is expected to happen once every 1,048,576 bets on a site with 1% house edge)
10 and 20 losses in a row on the same multiplier (aka win chance) are not the same (pardon the pun). Hitting 10 losses with a 50% win chance is not something that I would seriously consider "extremely unlucky" as you will likely see it within an hour or, if you are extremely lucky (sorry), in a day at best. Extremely unlucky to me is more like hitting the killing streak in a year or so (given the particular betting speed). Remember, you earn through variance, not by grinding along and collecting dust per hour, per day, or whatever
Within that timeframe, you will see enough outliers to increase your deposit sufficiently (actually, like many times, as
this thread clearly proves, unless you hit the max bet limit). That will allow you to survive ever longer and longer losing streaks by changing your autobet settings accordingly in the process (let's call it escape adjustment). Indeed, everything said holds true only if the casino doesn't put piles of roadblocks on your way to success like disabling small bets, limiting bet speed, etc (and remains provably fair or just fair beyond the house edge at all times, of course)
That's technically all you need to know