Martingale are a strategy where you double up your wager amount for a 2x payout and it could be use for any game. Blacjack is one of the game with a low house edge basically it is less than 1 %. With a proper strategy to hit and stand, basically it could be use to "help" in reducing your chance to lose.
You could check here on BlackJack strategy http://wizardofodds.com/games/blackjack/strategy/calculator/. It basically tells you on when to stand or hit , so consider it as a normal strategy not a "winning strategy" because strategies are meant to help you in reducing your chance to lose, not to help you keep on winning things
to stand or hit usually I use the feeling sometimes I have a good feeling
if only the minimum bet at the blackjack 0.0001, maybe I will last longer and many make a profit
because 0.001 is too big for me and usually I play with capital 0.01 - 0.03.
Well wagering at even minimum of 1 satoshi will make you bust soon enough if you have a bad streak on it . To be honest, your "feeling" has no effect to the result of your martingale bet, It will stand on either win or lose and nothing more of this "feeling" will change the outcome of it, best way will be to follow that wizardofodds BlackJack strategy
P.S : if you are looking for a site with lower wager amount for BlackJack then you should check on CoinRoyale which has 100 satoshis minimum bet ( I could be wrong on this )