Anxious people should not gamble because it is an activity that can increase stress and worsen their overall mental condition. Especially in gambling, there is a very high level of uncertainty and risk of loss, which can cause anxiety to worsen over time in someone who cannot properly control their emotions and thoughts. This may lead to a loss of focus and potentially result in impulsive decisions that harm them in the long run. Therefore, as an anxious person, one needs to stay away from high-risk activities such as gambling, as it could further deteriorate their condition.