Ethical Responsibilities in Client Investment Decisions

As an investment advisor, your primary responsibility is to act in the best interest of your clients. Recently, you received a request from a client who wants to invest in a risky startup. You believe the investment could be detrimental to the client's financial health given their current situation and investment objectives. However, the startup offers a significant commission to advisors who bring in clients.

Your client insists they want to proceed with the investment despite your concerns. In this scenario, what should be your course of action to uphold ethical standards?