Anybody interesed in my system send me a PM. It's still gambling, but I personnally made some nice profits with the system

Here's some numbers I came up with based on your suggestion of "start at 0.1 BTC and multiply by 1.5 until you win":
turn 1 | bet 0.10 | total 0.10 | win 0.40 | profit 0.30 | risk 75.59%
turn 2 | bet 0.15 | total 0.25 | win 0.60 | profit 0.35 | risk 57.13%
turn 3 | bet 0.23 | total 0.48 | win 0.90 | profit 0.43 | risk 43.18%
turn 4 | bet 0.34 | total 0.81 | win 1.35 | profit 0.54 | risk 32.64%
turn 5 | bet 0.51 | total 1.32 | win 2.03 | profit 0.71 | risk 24.67%
turn 6 | bet 0.76 | total 2.08 | win 3.04 | profit 0.96 | risk 18.65%
turn 7 | bet 1.14 | total 3.22 | win 4.56 | profit 1.34 | risk 14.10%
turn 8 | bet 1.71 | total 4.93 | win 6.83 | profit 1.91 | risk 10.65%
turn 9 | bet 2.56 | total 7.49 | win 10.25 | profit 2.76 | risk 8.05%
turn 10 | bet 3.84 | total 11.33 | win 15.38 | profit 4.04 | risk 6.09%
turn 11 | bet 5.77 | total 17.10 | win 23.07 | profit 5.97 | risk 4.60%
turn 12 | bet 8.65 | total 25.75 | win 34.60 | profit 8.85 | risk 3.48%
turn 13 | bet 12.97 | total 38.72 | win 51.90 | profit 13.17 | risk 2.63%
turn 14 | bet 19.46 | total 58.19 | win 77.85 | profit 19.66 | risk 1.99%
turn 15 | bet 29.19 | total 87.38 | win 116.77 | profit 29.39 | risk 1.50%
turn 16 | bet 43.79 | total 131.17 | win 175.16 | profit 43.99 | risk 1.14%
turn 17 | bet 65.68 | total 196.85 | win 262.74 | profit 65.88 | risk 0.86%
turn 18 | bet 98.53 | total 295.38 | win 394.10 | profit 98.73 | risk 0.65%
turn 19 | bet 147.79 | total 443.17 | win 591.16 | profit 147.99 | risk 0.49%
turn 20 | bet 219.00 | total 662.17 | win 876.00 | profit 213.83 | risk 0.37%
turn 21 | bet 219.00 | total 881.17 | win 876.00 | profit -5.17 | risk 0.28%
Looks to me that when (if!) you eventually win, your overall profit is roughly equal to the amount of your winning bet.
So if you win on the 20th turn, you bet 219 BTC, and make a profit of 213.83 BTC.
Of course, it's possible that you lose all 20 bets in a row, and then you lose the whole 662 BTC that you bet. Or you could play a 21st time and hope to almost break even.
Is this similar to your system?