When are we going to have smart wallets that can automatically create a sub-account (contract address) for special transaction we are not comfortable with? In Fintech, Revolut pioneered the creation of an ephemeral card for transactions that users may not fully trust a site on. This will be a game changer for web 3 wallets. That way, anyone can have a sub-account within a wallet that will allocate a small portion of capital for a transaction.