We will prioritize gold-backed tokens, but other types can also be traded. Why? Well, you saw all the market development in 2018 and the prices drop 60-90%. Stablecoins and tokens backed by the real assets can be great in these conditions - when the market is going red, gold-backed tokens have the minimum price, the price of underlying gold. And this price is not as volatile as that of stocks or crypto. So, for 2019 Goldman Sachs predicted at least 10% growth for gold. That means, a crypto portfolio which includes gold-backed tokens has at least one stable asset dedicated for growth no matter what is happening in the market