In Blackjack, whether you should bet more after a win or loss depends on your strategy, risk tolerance, and the system you choose to follow. According to basic Blackjack strategy, your bet size should remain consistent regardless of previous outcomes. This approach helps avoid letting emotions or past results affect your betting decisions, allowing you to focus on optimal play. Some players, however, use progressive betting systems like Martingale or Paroli. The Martingale system involves doubling your bet after a loss in an attempt to recover losses with a win, while Paroli increases bets after a win to capitalize on a winning streak. While these systems can be appealing, they carry risks such as hitting table limits or depleting your bankroll during extended losing streaks. For card counters, the strategy differs: bet sizes increase when the deck is favorable (more high cards left) and decrease when it’s not, based on the true count, rather than past wins or losses. For most players, however, it's generally advisable to keep bet sizes consistent unless you’re employing a specific strategy like card counting, as adjusting your bets after a win or loss can increase risk and reduce long-term profitability.