The best way to trade OTC is not on-chain, but Binance Pay. Why do you say that? Now there is not only black money, but also black U. If you receive black U, there is a probability that it will be frozen by Tether. Even if it is rushed to the exchange, the exchange also has a risk control system, and the probability of freezing is also very high.

How to avoid it? Borrowing the risk control system of the exchange, especially the risk control system of Binance that has been repeatedly tempered by the United States and other countries, it can basically ensure that almost all U in the market are clean, so using the internal transfer of Binance Pay is the relatively safest way.