Position that can be opened will be up to 5x and it is in BTCUSDC and ETHUSDC. Probably other trading pairs would be added later. Using USDC for it can be enough, as I know Coinbase to have been only supporting USDC stable coin.
But why Coinbase not going for BTCUSDT and ETHUSDT contracts too? On some exchanges that I am using, like Bybit and OKX, you can see both USDT and USDC contract. While on others that I am using like Binance, Kucoin and Huobi Global, only USDT is there because it is the most stablecoin with the highest liquidity. Why Coinbase do not like USDT future contracts?