A custodial wallet is a third-party service that allows users to store cryptocurrency, similar to a bank. This allows users to skip over the complication of private key storage, relying instead on the technological expertise of the company offering the service. However, there are tradeoffs. Custodial wallets are often targets for hackers or phishing scams, and they can also be seized or frozen by legal authorities. The best solution is to determine what type of wallet fits your individual risk tolerance and technological skill.