Yes, with Metamask you can sign something that could potentially transfer some of your assets later on. This is done by signing a transaction, which is a digitally signed message that is sent to the Ethereum network. The transaction contains details about the asset being transferred, such as the address of the sender and recipient, the amount to be transferred, and any other necessary information. The transaction is then validated by the network and, if successful, the asset is transferred to the recipient. Metamask makes this process easy and secure by providing a user-friendly interface that allows you to easily sign transactions and send them to the Ethereum network.