2.1 above odds, 50% plays

[fakeidentity]

Hi all, i'm new here and would like to try the above with a $100 bankroll. I will be playing on bet365, looking for bets with odds of 2.1 and above; the idea being, if i manage to go at least 50% on my picks, i will make a profit. I'll be risking $1 per bet until i double my bankroll ($200). If i drop back half, i will reduce it to $1 again. This will minimize variance. I will select the games base on a very simple system.

[fakeidentity]

Re: 2.1 above odds, 50% plays Lahti vs FC Haka, Under 2 @2.425, $1