for me i have a simple stratégie like others you need luck , start with 0.01 btc your base ammout is 4 satoshi on lose add 16% and on win return to base the number of lose make your profit high and stop in 5000 satoshi profit wait 10 min and start over
This is martingale, you can play with those random numbers, multipliers, raising on win, loss etc but at the end you will lose. Trust me.
Unless you are super lucky to hit certain combination of high-low(reversed martingale) or not to have too many reds in row(martingale).
I don't understand why people are so persistent with martingales.