i am one of those
july 2013 i finally starts with some money management strategy, it was a chase, betting only on tennis my best sport by far
start with 10 000 aus dollars, ends up with 20 000 two months later (i put 500 on Nadal to win US open back in july, odds 9.35)
september, starts to follow someone's tips in soccer don't know why... and lost 10 000 on 1 game, how stupid is that ?
anyone of you think they have great knowledge but crap money management ?? 90% of us i guess