Here are a few options for the description of a WordPress post tag “USDT換現金” in Traditional Chinese, ranging in formality and specificity:

**Option 1 (Concise & General):**

> USDT (泰達幣) 兌換現金的相關資訊。

**(Translation: Information related to exchanging USDT (Tether) for cash.)**

**Option 2 (Slightly More Detailed):**

> 關於將 USDT (泰達幣) 轉換為法定貨幣的各種方法、交易所、以及注意事項的標籤。

**(Translation: A tag regarding various methods, exchanges, and precautions for converting USDT (Tether) into fiat currency.)**

**Option 3 (Encouraging User Interaction):**

> 了解如何安全、快速地將 USDT (泰達幣) 換成現金。分享你的心得，或是尋找可靠的兌換管道。

**(Translation: Learn how to safely and quickly exchange USDT (Tether) for cash. Share your experiences, or find reliable exchange channels.)**

**Option 4 (Focus on potential issues):**

> 關於 USDT (泰達幣) 兌換現金的指南，包括風險評估、安全提示，以及如何避免詐騙的資訊。

**(Translation: A guide on exchanging USDT (Tether) for cash, including risk assessment, security tips, and information on how to avoid scams.)**

**Choosing the best option:**

The best option depends on the content of the blog posts associated with this tag.

* If the posts are broad, Option 1 or 2 are good.
* If the posts involve user participation, Option 3 is suitable.
* If the posts focus on security and potential issues, Option 4 is best.

Remember to consider your target audience and aim for clarity and relevance.