Casa, a cryptocurrency self-custody platform, has added support for Ethereum storage, offering multisignature security for both BTC and ETH. Casa’s flagship Bitcoin vault allows users to store the cryptocurrency using up to five keys for more distributed security. The company has now added an Ether vault to its platform, with ETH holders also able to use up to five keys to secure their holdings. Casa is also engaging with users over the potential of adding self-custody support for various ETH-related assets, including nonfungible tokens, stablecoins and ERC-20 tokens. The move comes amid increasing calls for a multisignature ETH self-custody from its users and the wider cryptocurrency community.