Betting too aggressively in Blackjack can quickly deplete your bankroll, especially if you experience a losing streak. It can also increase emotional stress, leading to poor decision-making. Players may fall into the trap of chasing losses by raising bets further, which can lead to even bigger losses. Aggressive betting might also cause you to stray from optimal strategy, compromising your chances of winning. Additionally, casinos might take notice of unusual betting patterns, potentially leading to being asked to leave the table or banned. It's best to bet within your means and maintain a disciplined approach to avoid these risks.