Financial Conduct Authority from Great Britain published a warning about Digital Gold Xchange.
At first glance Digital Gold Xchange seems to be a cryptocurrency exchange. But the terms and conditions reveal that trading is indirect, traders do not enter into possession of the tokens.
The trading is not direct, it occurs via contracts for difference (CFD). Therefore, Digital Gold Xchange is a broker that needs a licence in order to operate legally. But as the FCA noted, the broker is not regulated at all.
Since it also provides a fake Swiss address, Digital Gold Xchange is very probably a scam.
For trading use regulated brokers.