My biggest mistake was trying the Martingale strategy on a dice game. I started with a very small bet like 0.0001 Bitcoins. If you win you keep betting 0.0001 which means the winnings are very small if you lose, you double the bet.
I got on a long losing streak. At 10 losses in a row the bet got to 0.1024 Bitcoins which is starting to get to serious money. I had to stop before I lost my whole bankroll. I ended up losing a lot but not everything.
You are not alone in this experience. Many of us experience this kind of losing streak. The secret on this is that we must know how much bankroll we need to accomodate long series of losing streak. If our bankroll is just a small one then, this kind of method would incur trauma to the player .
personally though, I hit a 99x roll off the faucet the other day while waiting for an investment deposit to come in, imagine if I put my deposit on that roll instead