Qualified Custodian
A regulated firm, such as a bank or broker-dealer, that certain professional managers are required to use for holding client assets.
United States investment advisers are generally required to place client funds and securities with a qualified custodian, which must keep assets segregated, send account statements, and submit to periodic verification. Applying this to digital assets raises two questions: whether a given crypto custodian falls within the definition, and what possession or control means for an asset that is controlled by a private key rather than a book entry. In practice, state-chartered trust companies and bank subsidiaries have taken on the role, layering multi-signature or threshold key management, insurance policies with defined limits, and audited operating controls. Investors meet the term in fund documents, adviser disclosures, and due-diligence questionnaires.
In practice
A digital-asset product's prospectus names the custodian, describes whether keys are held offline, and states the scope and limits of any insurance the custodian carries.
The common misunderstanding
That qualified custodian means assets are insured against loss or hacking, when the label concerns legal status, segregation, and examination rather than any guarantee of reimbursement.