The reason the cryptocurrency market appears quiet this year can mainly be attributed to the strict risk control management of USDT trading, making it difficult to deposit and withdraw funds. Specifically:

1. **Strengthened Risk Control Management**: Due to concerns about the influence of traditional markets, investors have reduced their exposure to cryptocurrencies like Bitcoin, especially in USDT trading, where risk control measures have become exceptionally strict.

2. **Anti-Fraud Monitoring**: Not only on the app side, but also payment platforms like Alipay, WeChat, and bank cards are being monitored to combat illegal activities related to virtual currencies, greatly limiting cryptocurrency trading.

3. **Association with Black and Gray Industries**: Currently, virtual currencies have become intertwined with black and gray industrial chains, making it difficult to distinguish between them. Therefore, any buying or selling of USDT may be subject to scrutiny.

4. **Personal Trading Risks**: Individuals face the risk of investigation when buying or selling USDT, and even legitimate transactions may attract the attention and scrutiny of regulatory agencies.

5. **Legal Risks**: According to Chinese government regulations, activities related to virtual currencies are considered illegal financial activities, and participating in virtual currency investment and trading carries legal risks.

6. **Regulatory Policies**: China's regulatory policies on cryptocurrency trading continue to tighten, and any form of cryptocurrency exchange services are viewed as illegal, directly impacting the activity level in the cryptocurrency market.

Therefore, due to the aforementioned strict regulatory and risk control measures, trading activities in the cryptocurrency market have been significantly suppressed this year, resulting in a relatively quiet market.