I believe Coin Hi low game on freebitcoin is rigged as I have lost a steak of 12 games in a row. I bet on Hi each time while doubling my bet and lost all of my balance. What are odds to get 11 Lo in a row with 50% probablity?
It's not a question of odds, it's a question of you not wanting to understand that Martingale is a shit strategy with which you think you have a system to beat the house, when it's a system older than Methuselah and it's a shit system because when it goes well you only win the initial bet, and when it goes badly, as has happened to you, you lose a lot of money in relation to the initial bet.
So no, it is not rigged. Or at least if you want to affirm that it is not based on the fact that the predictable has happened to you: that you have played with the Martingale 'strategy' and you have lost.