Martingale starting at 1
p = 1-0.5057 = 0,99162394
EV = p*1-(1-p)*127 = 0,99162394 - 0,0083760574 * 127 = -0,0721353 !!!!
The martingale is clearly much better. The expected value is much closer to zero than the single bet.
The average bet size of the martingale is 7.21B and the average return is -0,0721353, so there is no change in Kelly or more expected return or whatever problem of any sort. However that idea that with a Martingale I can better use my money (achieving a profit with a smaller average bet size) is interesting for a theoretical speculation.