The best time to start betting in a blackjack game depends on your level of preparation and the game's dynamics. It's ideal to wait for a favorable deck if you can count cards, as this can increase your odds of winning. Additionally, it's important to feel confident in using basic strategy to make informed betting decisions. A less crowded table can also help you focus better, while some players prefer betting when a table has had a string of wins, though this is more of a superstition. If you're new to the game, starting with small bets and gradually increasing as you gain experience is a wise approach. Overall, the best time to bet is when you feel both comfortable and prepared.