Tether, the issuer of USDT, is valued at $500 billion, surpassing companies like OpenAI and ByteDance. The valuation is supported by Tether's high profitability and strong asset base, but it faces challenges due to its reliance on interest rates and stablecoin demand. Additionally, regulatory compliance and market competition pose significant risks. Compared to OpenAI and ByteDance, Tether's valuation appears high, with insufficient risk premium. Stricter regulations could impact its future performance. The sustainability of Tether's valuation hinges on its ability to maintain profitability and manage risks effectively.