The risk-to-reward ratio of card counting in Blackjack depends on the player's skill, the casino environment, and the specific circumstances. Skilled counters can gain a modest edge of about 0.5% to 1.5% over the house, leading to potential profits over time. However, the primary risk is being detected by casino staff, which could result in being banned or asked to leave. Additionally, the variability in bet sizes and the inherent randomness of the game means players can experience significant bankroll swings, even with an edge. The strategy requires both discipline and experience to be effective, and while the reward can be worthwhile for skilled counters, the risk of losing money or being caught may outweigh the potential gains for less experienced players.