How does a house call work?

Could you elaborate on the process of a house call in the realm of cryptocurrency and finance? Are there specific services or consultations that can be conducted in one's residence, and how does this differ from traditional in-office consultations? Are there any benefits or drawbacks to opting for a house call over an in-person meeting at a financial institution or cryptocurrency exchange? Additionally, what are the requirements and protocols that must be followed to ensure the security and confidentiality of the transaction or consultation during a house call?