BTW, don't think that losing 300 bets is anywhere near as likely as losing 70 bets. If losing 300 bets is 0.1%, losing 70 bets is

.001^(70/200) = 20% or 200 times less likely. If you lose 70 bets once in 100 hours, you will not lose 300 bets for 20,000 hours.