I don't have a bankroll at the moment but I think it's not crazy for people who play poker or sports betting to get 10% a month. Winners I mean. Obviously more than 90% are losers.
After writing this I was curious to see what the AI was saying and it said no, for winners half of that, or even less, would be more realistic.
Sports Betting
Type of Bettor Realistic Monthly ROI on Bankroll Notes
Recreational Negative to 1% Most bettors lose over time.
Semi/Sharp 1%–3% Requires discipline, tracking, line shopping.
Pro/Sharp 2%–5% (on turnover) Sustainable, but you’ll have down months.
Syndicates/ High Volume Pros 1%–2% monthly on bankroll Massive volume, small edge per bet, and excellent market timing.
I still kind of fail to see how this is measured...
You have a $1000 of bankroll, you supposedly need to make $20-$100 depending on the scenarios.
Now here is the problem, you win your first two bets for the month, you make $30 out of a 4x $10 bet and 2x$20 out of 2x 10 bets, your target is reached, well, your bankroll was at most $30, you never got to use more, so....the extra $970 just stayed on the side.
Digging deeper, let's assume you experience loss after loss after loss, you end up losing $980 in bets for the month, let me tell you from the start that with the last $20 you go back and make $1030 is just bs, this is straight fantasy level.
I don't think anyone calculated this on bankroll, more on the
turnover, now that would make sense!
The bankroll thing in sports? Unless you're snipping all 1.01 odds and you need a huge bankroll to keep 100 bets alive and still have money till the winning are settled, to bet makes little sense in this math.