The blackjack dealer and players shouldn’t touch the chips at any given time. Cameras ensure that the action moves smoothly, and the general rule is that the players can only add chips before the deal. From there, neither the player nor the dealer should touch the chips.
After playing the round, you can pick your original wager and winning chips and place your next bet. If you lose, the dealer will take your chips at that point.
Except for these instances, you shouldn’t move, play, or touch the chips on the table. Not following this rule can indicate to the casino that you are trying to cheat by adding or lowering your bet.