Can I Buy/Sell other Cryptocurrencies and Win? Quidax Support September 29, 2020 11:02 Updated For this competition, you only stand a chance of winning when you buy/sell Bitcoin with USDT. Related articles Are there any tips that can help me win? What is Bitcoin Cash? How to buy or sell using market order Can I Buy/Sell on the Mobile App or the Web? How do I get a Quidax Bank Account Number (QBAN)?