It is offered both as an ordinary blackjack side bet and as a side bet for Spanish 21. Among these, the wager “Bust It” (BI) has been around the longest. Among these side bets are “Bet the Bust,” “Bust Bonus,” “Bust It,” “Buster Blackjack,” and “Dealer Bust 21.” The market probably has room for one of these to be moderately successful: the winner of that battle is still to be determined.
In the past few years there has been a proliferation of blackjack side bets based on the theme of the dealer busting.