The phrase "wert a sign of" can be interpreted in multiple ways, depending on the context in which it is used. However, some antonyms that could be associated with this phrase include insignificance, irrelevance, and unimportance. When something is not considered as a sign of anything significant, it is often viewed as insignificant. Similarly, when a particular thing does not serve any purpose or relevance in a situation, it can be described as irrelevant. Lastly, if something does not hold any value or importance, it can be classified as unimportant. Therefore, the antonyms of "wert a sign of" suggest that the thing in question lacks any significance, relevance, or importance.