[nothrabannosir]

Parent was referring to the “hundreds” part, not the 7. If 5% of your bets win, but only pay off in the hundreds %, you’re going bankrupt. You need at least 2000% return, amortised over the winners, to break even. More to beat that 7%.

[vidarh]

Yes, but the point being that 7% is an annualized number; if the hundreds of percent is also referring to annualized returns, then it makes sense.