When considering an insurance bet in blackjack, players should assess the risk by evaluating the probability of the dealer having a blackjack and the impact on their overall expected returns. Since insurance pays 2:1 but only benefits the player if the dealer’s downcard is a 10-value, it typically carries a high house edge. Skilled players often avoid insurance unless card counting or similar techniques indicate an unusually high number of 10-value cards remaining, increasing the likelihood of a dealer blackjack.