Publicly traded crypto exchange Gemini expanded its credit card suite on Monday, unveiling the Solana Card—a new credit card that offers instant Solana (SOL) rewards with an optional auto-staking feature to boost rewards.  The firm also offers Bitcoin and XRP-themed credit cards, all of which offer up to 4% back on purchases in instant crypto rewards.  While the Solana Card will operate like Gemini’s other cards, the latest product comes with a new, optional auto-staking feature for those seeking Solana rew ...