A stablecoin is a cryptocurrency that is pegged to a traditional fiat currency or to a commodity, such as gold. There are many types of stablecoins. The three we accept on our platform are USDT, issued by Tether, USDC, issued by Circle, and DAI, issued by MakerDAO. Each of these stablecoins is equal to one US dollar. They are three of the largest stablecoins in the market. The benefit of stablecoins is that they exist on blockchains and can therefore be used to trade for other cryptocurrency tokens, and they are stable in value, so do not have the volatility typically associated with cryptocurrencies.  CarbonKerma accepts these three stablecoins.