I think another thing to take note of is that max profit was much harder to hit in V1 as the maxBet was capped at 1 btc. So hitting 60 btc only happened roughly 1/60 times. Even assuming max profit was 0.75% instead of 3% and max profit was 20 btc, that's still 1/20 times.

With the new system, you can bet the max profit and hit it roughly 1/2 times. That's 30x higher than before, 10x higher if you assume V1 max profit was 20 btc at 0.75%. V1 was an order of magnitude safer in terms of bankroll fluctuation since kelly/double kelly were hit that much less often.

I still feel that it's not great that double kelly is possible + hit so often when there's 2 accounts used. Yesterday there were 2 sets of 2 accounts that hit double kelly repeatedly: pineappleswrl & offtheshits, xxxrip & perrrrs (all the same guy)

I feel that because max bet isn't 1 BTC but always scales with the max profit, that no matter how large the bankroll, as long as there are whales willing to repeatedly hit double kelly, the bankroll will always be at risk of large fluctuations.