Prometheum Inc., a U.S.-registered crypto platform and the only one approved by the SEC, has expanded its custodial services to include Uniswap's UNI, Arbitrum's ARB, and Ethereum tokens. This move comes despite Uniswap's stance that UNI is not a security and the SEC's previous indication that Ethereum is a commodity. The expansion of Prometheum's securities custody list has sparked controversy, as questions arise about the compliance and registration of these tokens with the SEC. Prometheum's decision aligns with its ongoing efforts to meet SEC demands, although the regulatory status of these tokens remains contentious.