USDT (Tether USD) is not completely prohibited in Europe, but there are some restrictions and concerns regarding its use.
Reasons for concern
1. Stability: some European authorities have expressed concerns about the stability of USDT, as it is tied to the value of the US dollar and may be subject to default risks.
2. Transparency: there have been criticisms regarding the lack of transparency about the reserves backing USDT, which could affect its stability.
3. Regulation: the European Union has introduced new rules for cryptocurrencies, such as the MiCA regulation (Markets in Crypto-Assets), which could affect the use of USDT.
Current situation
1. Not prohibited: USDT is not completely prohibited in Europe, but there are some restrictions and requirements for the exchanges that offer it.
2. Compliance requirements: exchanges offering USDT must comply with EU rules and requirements, such as anti-money laundering and counter-terrorism financing.
Conclusion
In summary, USDT is not prohibited in Europe, but there are some concerns and restrictions regarding its use. European authorities are working to introduce clearer and more transparent rules for cryptocurrencies, which could affect the use of USDT and other cryptocurrencies in the region.