I've had plenty of success with the Martingale strategy on the Auto-bet option on Multiply BTC. Set ON WIN to Return to Base Bet and ON LOSE to Increase Bet By 50% (although martingale requires doubling) and start. Unless you're VERY unlucky, this will garner you consistent gains. But here's something you have to take into account: have atleast a 100,000 satoshi balance, and start betting with 5-10 satoshi per bet to minimize the chance of losing everything at once.
This might work for months but eventually you will lose it all as this system has been flawed many times before. Also people get greedy when they win all the time and think that they will never lose using a system like this but then reality hits when they lose it all even if you have 0.01 or 0.1, it doesn't matter as you will lose. Its been proven in roulette that this never works and also with dice games like multiply btc.