Use an Are you sure? bash prompt for confirmation.
read -p "Are you sure you want to continue? [y/n] " -n 1 -r; echo if [[ $REPLY =~ ^[Yy]$ ]]; then echo "Continuing..." fi
Ask the inverse by using an exclamation point to negate the if statement.
read -p "Continue? [y/n] " -n 1 -r; echo if ! [[ $REPLY =~ ^[Yy]$ ]]; then echo "Stopped" exit fi