To many win gambling with BTC, cause the bet is small, so I can make a low risk..

0.00001 on roullet can win by mathematic..

bet on red and black,

red - lose 0.00001
red - lose 0.00002
red - win  0.00003 -> 0.00006
balck - win 0.00001 -> 0.00002
.
.
.
etc

Good Luck