Digital asset custody firm Prometheum has announced plans to add Uniswap (UNI) and Arbitrum (ARB) to its custodial platform, alongside Ethereum (ETH), with services expected to launch in Q3. Prometheum classifies these tokens as "digital asset securities," a designation that may be controversial, especially since Ether is often viewed as a commodity. Through its subsidiary, Prometheum Capital, the firm aims to provide custody and eventually trading services for various assets. Source: Cointelegraph