The original question in the tweet was about whether Curve Finance rewards could be earned in other cryptocurrencies besides USDC. Curve Finance replied with a humorous comment, indicating that rewards are only paid in YFI. This answer is in line with the fact that Curve Finance is a DeFi platform for YFI holders, so it makes sense that rewards would be paid out in YFI. However, this does not mean that rewards cannot be earned in other cryptocurrencies. In fact, Curve Finance offers a range of different options for earning rewards, including staking, liquidity mining, and yield farming. By taking advantage of these options, users can earn rewards in a variety of different cryptocurrencies, depending on the specific platform they are using.