Let me put this another way. If you take every suitable gamble you can, even if they're one time deals, you'll end up further ahead in the long run than the guy who only takes suitable gambles that are repeatable. Thus whether or not the gamble is repeatable should have no bearing on your decision.
(I'm using the term suitable somewhat vaguely here, since even +EV gambles can be bad ideas in the long run due to bankroll considerations. But for what we're talking about, we're assuming all the gambles are the same in all other respects.)
(I'm using the term suitable somewhat vaguely here, since even +EV gambles can be bad ideas in the long run due to bankroll considerations. But for what we're talking about, we're assuming all the gambles are the same in all other respects.)