I made from 0.3 -> 5 BTC in 10 hours with martingale on PrimeDice.
It were so freakin crazy.. that "ride" raised my total wagered to 113 BTC.
Then I cashed out and lost it all back 3 weeks later..
My highest bet were around 1.25 BTC.
Martingale is always a losing strategy in the long-run.. if you don't have unlimited money supply.
Unlimited supply of money wouldn't even help you since sites have maximum bets that you'll hit quickly using martingale.
Yea, but in "theory" martingale would work if you have a unlimited money supply. But not on PrimeDice