Uphold is a global, multi-asset digital trading platform with more than 10M users. Our mobile app allows you to purchase and trade 250+ cryptocurrencies (BTC, ETH, XRP, XDC, DAG, ADS, CSPR & QNT), and 27 national currencies (Forex). Uphold is a global, multi-asset digital trading platform with low fees and deep liquidity. You can purchase and trade 250+ cryptocurrencies and 27 national currencies, get a free virtual card, and access other features. UPHOLD definition: 1. to defend or keep a principle or law, or to say that a decision that has already been made…. Learn more. Securely buy, sell, and trade over 250 cryptocurrencies with Uphold's transparent and easy-to-use platform.