Until FATCA is implemented, you will still be able to trade Crypto to Crypto on COSS.IO.
You will still be subjected to mandatory KYC according to the new guidelines.
By the US, we mean US citizens AND US residents. If you are a US citizen or resident, you will not be able to trade FIAT until FATCA reporting is fully implemented.
Once FATCA is implemented, the option to trade FIAT will be open to you, and no new submission of documents will be required.